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Kronborg

Kronborg is a castle and stronghold in the town of Helsingør, Denmark. Immortalized as Elsinore in William Shakespeare's play Hamlet, Kronborg is one of the most important Renaissance castles in Northern Europe. It was inscribed on the UNESCO World Heritage List in 2000.

The castle is situated on the extreme northeastern tip of the island of Zealand at the narrowest point of the Øresund, the sound between present Denmark and the provinces of present Sweden. The latter were under Danish control at the time the castle was built. In this part, the sound is only 4 km wide, hence the strategic importance of maintaining a coastal fortification at this location commanding one of the few outlets of the Baltic Sea.

The castle's story dates back to a stronghold, Krogen, built by King Eric VII in the 1420s. Along with the fortress Kärnan in Helsingborg, on the opposite coast of Øresund, it controlled the entrance to the Baltic Sea. From 1574 to 1585, King Frederick II had the medieval fortress radically transformed into a magnificent Renaissance castle. The main architects were the Flemings Hans Hendrik van Paesschen and Anthonis van Obbergen. The sculptural work was coordinated by Gert van Groningen.

In 1629, a fire destroyed much of the castle, but King Christian IV subsequently had it rebuilt. The castle has a church within its walls. In 1658, Kronborg was besieged and captured by the Swedes, who took many of its valuable art treasures as war booty.

In 1785 the castle ceased to be a royal residence and was converted into barracks for the Army. The Army left the castle in 1923. After a thorough renovation, the complex was opened to the public.

Krogen
The castle's history dates to a fortress, Krogen (lit. "the Hook"), built in the early 15th century by the Danish king, Eric of Pomerania. The king insisted on payment of sound dues by all ships wishing to enter or leave the Baltic Sea through the Øresund; to help enforce his demands, he built a powerful fortress at the narrowest point in the Sound. At the time, the Kingdom of Denmark extended across both sides of the Sound. On the eastern shore the Helsingborg Castle had been operating since the Middle Ages. With the two castles and guard ship, Denmark could control all navigation through the Sound.

The castle was built on Ørekrog, a sandy tongue of land stretching into the sea from the coast of Zealand toward the coast of Scania. The castle consisted of a square curtain wall with a number of stone buildings inside. The stone building in the northeastern corner contained the king's residence. The building in the southwestern corner contained a large arched banquet hall. The building in the southeastern corner possibly served as the chapel. Large portions of the walls of Krogen are contained within the present-day Kronborg Castle.

King Christian III had the corners of the curtain wall supplemented with bastions in 1558–1559.

Frederick II's Kronborg

As a consequence of developments in the military technique of the era and the improved striking power of the artillery, it became clear that it was necessary to modernize the fortifications of Krogen. After the conclusion of the Northern Seven Years' War in 1570, King Frederick II initiated an extension of the advanced bastions to relieve the medieval curtain wall. The main architect was the Flemish architect Hans Hendrik van Paesschen and the fortification works were completed in 1577. After this, the castle acquired its current name of Kronborg (lit. 'Crown Castle').

The castle itself was rebuilt from 1574 to 1585, with the separated buildings of Krogen being extended to three coherent wings. The north wing was equipped with chambers for the king, queen and her ladies-in-waiting as well as for the chancellery. In the south wing, the medieval building in the southeast corner was refitted as a modern chapel with the vaulted windows facing the chapel being retained. Frederick was a keen patron of theatre and players performed at the castle when he held court there in 1579.

Initially, the castle was reconstructed only to a height of two storeys. In 1578, however, the Flemish architect Anthonis van Obbergen was engaged as new master builder and work was undertaken to make Kronborg even larger and more magnificent. The sculptural work was coordinated by Gert van Groningen. As a sign of the new ambitions, the south wing was heightened by one storey and a new, gigantic ball room placed over the chapel. Soon after the west and north wings were also heightened by one storey. Finally, the east wing was also heightened with a passageway, The Queen's Gallery, allowing the Queen comfortable passage from her chambers in the north wing to the ball room in the south wing. The exterior walls were clad with sandstone from Scania, and the new castle was given a roof with copper sheeting.

James VI of Scotland stayed in the castle in 1590 after his marriage to Anne of Denmark. James gave 2,000 Danish dalers in gold coins to the officers and servants in the castle as a reward.

Fire of 1629

In 1629, a moment's carelessness by two workmen caused much of the castle to go up in flames in the night between the 24 and 25 September. Only the chapel was spared by the strength of its arches. King Christian IV put great efforts into restoring the castle. Already in 1631, the work was underway, led by the architect Hans van Steenwinckel the Younger. By 1639, the exterior — which in keeping with the king's wish was reconstructed without major changes — was once again magnificent, but the interior never fully regained its former glory. Furthermore, certain modernizations were made, and portals, chimneypieces, ceiling paintings and other decorations were renewed in Baroque style.

Swedish conquest of 1658

During the Dano-Swedish war of 1658–1660, Kronborg was besieged, attacked and conquered by a Swedish army commanded by Carl Gustaf Wrangel. During the Swedish occupation, the queen of Sweden, Hedvig Eleonora of Holstein-Gottorp and the Swedish king's sister Maria Eufrosyne of Pfalz lived at Kronborg, where they were visited by Charles X of Sweden during the campaign and entertained the foreign ambassadors.

As a result of the Swedish occupation, Kronborg was deprived of many of its most precious art works, including the richly decorated fountain in the castle courtyard, Frederick II's canopy and a number of the large ceiling paintings commissioned by Christian IV for the ballroom.

Garrison fortress

The Swedish conquest of Kronborg in 1658 demonstrated that the castle was far from impregnable. Afterwards, the defences were strengthened significantly. From 1688 to 1690, an advanced line of defence was added called the Crownwork. Shortly afterwards, a new series of ramparts were built around it. After their completion, Kronborg was considered the strongest fortress in Europe.

From 1739 until the 20th century, Kronborg was used as a prison. The inmates were guarded by the soldiers billeted in the castle. The convicts had been sentenced to work on the castle's fortifications. The convicts were divided into two categories: those with minor sentences were categorised as "honest" and were allowed to work outside the castle walls; those serving sentences for violence, murder, arson or the like were categorised as "dishonest" and had to serve the full sentence doing hard physical labour inside the castle ramparts. Otherwise, they served their time under the same conditions: they all had to wear chains and spend nights in cold and damp dungeons. From January 17, 1772, to April 30, 1772, Kronborg was the place of imprisonment of Queen Caroline Mathilde, sister of King George III, following the scandal of her affair with Johann Friedrich Struensee.

As Kronborg's importance as a royal castle diminished, the armed forces came to play a greater role. From 1785 to 1922, the castle was completely under military administration. During this period, a number of renovations were completed.

Sound Dues and recent history
The captain of every ship sailing through the strait had to state the value of ship's cargo. Money that had to be paid to the King of Denmark, called Sound Dues, was then calculated depending on the value of the cargo. The king had the right to buy the cargo for the price the ship's captain stated. This policy prevented captains from stating prices that were too low. The Royal Danish Army left the castle in 1923, and after a thorough renovation it was opened to the public in 1938.

Kronborg today

Kronborg Castle is located on the extreme northeastern tip of the island of Zealand, to the northeast of the historic centre of the town of Helsingør. It is situated at an elevation of 12 metres, on a small foreland jutting out into the narrowest point of the Øresund, the sound between the Danish island of Zealand and the Swedish province of Scania, that was also Danish until 1658. The approach from the town is to the east, with a series of moats and gates protecting the route from the town to the castle itself.

Royal apartments

The royal apartments are located on the first floor of the north wing. The apartments were originally furnished by Frederick II around 1576, but after the fire in 1629, Christian IV had the apartments refurnished and richly decorated with ceiling paintings, stone portals and chimneypieces. The original floors were tiled in black and white which were replaced with wooden floorboards in 1760–61, and the walls were clad in gilt-leather. Today the chambers are furnished with Netherlandish furniture from the 17th century.

The King's Chamber has a bay window, located right above the castle's main portal, from which the king could keep an eye on guests arriving at the castle, whereas the Queen's Chamber has access to a vaulted tower chamber overlooking the Flag Bastion.

Ballroom

Measuring 62 x 12 metres, the Ballroom was the largest hall in Northern Europe when it was completed in 1582. The walls are hung with a series of large paintings which were originally made from 1618 to 1631 for the Great Hall of Rosenborg Castle in Copenhagen. The paintings in the Ballroom include: Children off to School by Francis Cleyn, Feminine Pursuits by Reinhold Timm, Riding at the Ring by Reinhold Timm, A Boys School by Francis Cleyn, A Wedding in a Church by Francis Cleyn, An Academy for Noblemen by Reinhold Timm, A Banquet (1622) by Isaac Isaacsz. The present floor and the fireplaces are from the rebuilding in 1924–38.

Little Hall

The walls of the Little Hall are furnished with seven tapestries originally from a series of forty tapestries portraying one hundred Danish kings. The masterpieces include Tapestry depicting Oluf (1376–1387) and Tapestry depicting Knud VI (1182–1202). The tapestries were commissioned by Frederick II around 1580. Seven more tapestries are at the National Museum of Denmark, while the rest have been lost.

Chapel

The chapel is located in the ground floor of the south wing and was inaugurated in 1582. In 1785, as the castle was being fitted for use as army barracks, the chapel was fitted out as a gymnasium and fencing hall and the furniture stored away. The chapel was refurnished with the original furniture in 1838 and reinaugurated in 1843.

Hamlet
Kronborg is depicted as "Elsinore", the setting of William Shakespeare's tragedy Hamlet, Prince of Denmark, though "Elsinore" is actually the anglicised name of the surrounding town of Helsingør. Hamlet was performed in the castle for the first time to mark the 200th anniversary of the death of William Shakespeare, with a cast consisting of soldiers from the castle garrison. The stage was in the telegraph tower in the southwest corner of the castle.

The play has since been performed several times in the courtyard and at various locations on the fortifications. Later performers to play Hamlet at the castle included Laurence Olivier, John Gielgud, Christopher Plummer, Derek Jacobi, David Tennant, and in 2009 Jude Law. In 2017, Hamletscenen presented a production of Hamlet at Kronborg, directed by Lars Romann Engel; the role of Hamlet was played by Cyron Melville and music for the production was composed by Mike Sheridan.

Ogier the Dane

According to a legend linked to Arthurian myth, a Danish king known as Ogier the Dane (Danish: Holger Danske), was taken to Avalon by the enchantress Morgan le Fay. Ogier returned to rescue France from danger, then travelled to Kronborg castle, where he sleeps until he is needed to save his homeland. His beard has grown to extend along the ground. A statue of the sleeping Ogier (right) has been placed in the castle casemates.

Culture Harbour Kronborg
Kulturhavn Kronborg is an initiative of 2013 to offer a variety of culture experiences to residents and visitors to Helsingør. Kulturhavn Kronborg is a joint initiative by Kronborg Castle, Danish Maritime Museum, Kulturværftet and Helsingør harbour.

Other
The castle was the setting of the televised holiday series Jul på Kronborg (Christmas at Kronborg), which featured both Hamlet and Holger the Dane. 'Elsinore Beer' is named for the castle in the 1983 comedy Strange Brew, starring Rick Moranis and Dave Thomas.

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Jupiter

Jupiter is the fifth planet from the Sun and the largest in the Solar System. A gas giant, Jupiter's mass is more than two and a half times that of all the other planets in the Solar System combined and slightly less than one one-thousandth the mass of the Sun. Jupiter orbits the Sun at a distance of 778.479 Gm with an orbital period of $0.049$. It is the third brightest natural object in the Earth's night sky after the Moon and Venus and has been observed since prehistoric times. Its name derives from Jupiter, the chief deity of ancient Roman religion.

Jupiter was the first planet to form, and its inward migration during the primordial Solar System impacted much of the formation history of the other planets. Hydrogen constitutes 90% of Jupiter's volume, followed by helium, which forms 25% of its mass and 10% of its volume. The ongoing contraction of Jupiter's interior generates more heat than the planet receives from the Sun. Its internal structure is believed to consist of an outer mantle of fluid metallic hydrogen and a diffuse inner core of denser material. Because of its rapid rotation rate of one rotation per ten hours, Jupiter's shape is an oblate spheroid; it possesses a slight but noticeable bulge around the equator. The outer atmosphere is divided into a series of latitudinal bands, with turbulence and storms along their interacting boundaries. The most obvious result of this is the Great Red Spot, a giant storm that has been recorded since at least 1831.

Jupiter is surrounded by a faint planetary ring system and has a powerful magnetosphere, the second largest contiguous structure in the Solar System (after the heliosphere). Jupiter forms a system of 95 known moons and probably many more, including the four large moons discovered by Galileo Galilei in 1610: Io, Europa, Ganymede, and Callisto. Ganymede, the largest of the four, is larger than the planet Mercury. Callisto is the second largest; Io and Europa are approximately the size of Earth's Moon.

Since 1973, Jupiter has been visited by nine robotic probes: seven flybys and two dedicated orbiters, with one more en route and one awaiting launch.

Name and symbol
In both the ancient Greek and Roman civilizations, Jupiter was named after the chief god of the divine pantheon: Zeus to the Greeks and Jupiter to the Romans. The International Astronomical Union formally adopted the name Jupiter for the planet in 1976, and has since named its newly discovered satellites for the god's lovers, favourites, and descendants. The planetary symbol for Jupiter,, descends from a Greek zeta with a horizontal stroke, $11.862 yr$, as an abbreviation for Zeus.

In Latin, Iovis is the genitive case of Iuppiter, i.e. Jupiter. It is associated with the etymology of Zeus ('sky father'). The English equivalent, Jove, is only known to have come into use as a poetic name for the planet around the 14th century.

Jovian is the adjectival form of Jupiter. The older adjectival form jovial, employed by astrologers in the Middle Ages, has come to mean 'happy' or 'merry', moods ascribed to Jupiter's influence in astrology.

The original Greek deity Zeus supplies the root zeno-, which is used to form some Jupiter-related words, such as zenographic.

Formation and migration
Jupiter is believed to be the oldest planet in the Solar System, having formed just one million years after the Sun and roughly 50 million years before Earth. Current models of Solar System formation suggest that Jupiter formed at or beyond the snow line: a distance from the early Sun where the temperature was sufficiently cold for volatiles such as water to condense into solids. The planet began as a solid core, which then accumulated its gaseous atmosphere. As a consequence, the planet must have formed before the solar nebula was fully dispersed. During its formation, Jupiter's mass gradually increased until it had 20 times the mass of the Earth, approximately half of which was made up of silicates, ices and other heavy-element constituents. When the proto-Jupiter grew larger than 50 Earth masses it created a gap in the solar nebula. Thereafter, the growing planet reached its final mass in 3–4million years. Since Jupiter is made of the same elements as the Sun (hydrogen and helium) it has been suggested that the Solar System might have been early in its formation a system of multiple protostars, which are quite common, with Jupiter being the second but failed protostar. But the Solar System never developed into a system of multiple stars and Jupiter today does not qualify as a protostar or brown dwarf since it does not have enough mass to fuse hydrogen.

According to the "grand tack hypothesis", Jupiter began to form at a distance of roughly 3.5 AU from the Sun. As the young planet accreted mass, interaction with the gas disk orbiting the Sun and orbital resonances with Saturn caused it to migrate inward. This upset the orbits of several super-Earths orbiting closer to the Sun, causing them to collide destructively. Saturn would later have begun to migrate inwards at a faster rate than Jupiter, until the two planets became captured in a 3:2 mean motion resonance at approximately 1.5 AU from the Sun. This changed the direction of migration, causing them to migrate away from the Sun and out of the inner system to their current locations. All of this happened over a period of 3–6million years, with the final migration of Jupiter occurring over several hundred thousand years. Jupiter's migration from the inner solar system eventually allowed the inner planets—including Earth—to form from the rubble.

There are several unresolved issues with the grand tack hypothesis. The resulting formation timescales of terrestrial planets appear to be inconsistent with the measured elemental composition. It is likely that Jupiter would have settled into an orbit much closer to the Sun if it had migrated through the solar nebula. Some competing models of Solar System formation predict the formation of Jupiter with orbital properties that are close to those of the present day planet. Other models predict Jupiter forming at distances much farther out, such as 18 AU.

According to the Nice model, infall of proto-Kuiper belt objects over the first 600 million years of Solar System history caused Jupiter and Saturn to migrate from their initial positions into a 1:2 resonance, which caused Saturn to shift into a higher orbit, disrupting the orbits of Uranus and Neptune, depleting the Kuiper belt, and triggering the Late Heavy Bombardment.

Based on Jupiter's composition, researchers have made the case for an initial formation outside the molecular nitrogen (N2) snow line, which is estimated at 20 - 30 AU from the Sun, and possibly even outside the argon snow line, which may be as far as 40 AU. Having formed at one of these extreme distances, Jupiter would then have, over a roughly 700,000-year period, migrated inwards to its current location, during an epoch approximately 2–3 million years after the planet began to form. In this model, Saturn, Uranus, and Neptune would have formed even further out than Jupiter, and Saturn would also have migrated inwards.

Physical characteristics
Jupiter is a gas giant, meaning its chemical composition is primarily hydrogen and helium. These materials are classified as gasses in planetary geology, a term that does not denote the state of matter. It is the largest planet in the Solar System, with a diameter of 142984 km at its equator, giving it a volume 1,321 times that of the Earth. Its average density, 1.326 g/cm3, is lower than those of the four terrestrial planets.

Composition
By mass, Jupiter's atmosphere is approximately 76% hydrogen and 24% helium, though, because helium atoms are more massive than hydrogen molecules, Jupiter's upper atmosphere is about 90% hydrogen and 10% helium by volume. The atmosphere also contains trace amounts of methane, water vapour, ammonia, and silicon-based compounds, as well as fractional amounts of carbon, ethane, hydrogen sulfide, neon, oxygen, phosphine, and sulfur. The outermost layer of the atmosphere contains crystals of frozen ammonia. Through infrared and ultraviolet measurements, trace amounts of benzene and other hydrocarbons have also been found. The interior of Jupiter contains denser materials—by mass it is roughly 71% hydrogen, 24% helium, and 5% other elements.

The atmospheric proportions of hydrogen and helium are close to the theoretical composition of the primordial solar nebula. Neon in the upper atmosphere only consists of 20 parts per million by mass, which is about a tenth as abundant as in the Sun. Jupiter's helium abundance is about 80% that of the Sun due to precipitation of these elements as helium-rich droplets, a process that happens deep in the planet's interior.

Based on spectroscopy, Saturn is thought to be similar in composition to Jupiter, but the other giant planets Uranus and Neptune have relatively less hydrogen and helium and relatively more of the next most common elements, including oxygen, carbon, nitrogen, and sulfur. These planets are known as ice giants because during their formation these elements are thought to have been incorporated into them as ices; however, they probably contain little ice today.

Size and mass
Jupiter's mass is 318 times that of Earth; 2.5 times that of all the other planets in the Solar System combined. It is so massive that its barycentre with the Sun lies above the Sun's surface at 1.068 solar radii from the Sun's centre. Jupiter's radius is about one tenth the radius of the Sun, and its mass is one thousandth the mass of the Sun, as the densities of the two bodies are similar. A "Jupiter mass" ( or ) is often used as a unit to describe masses of other objects, particularly extrasolar planets and brown dwarfs. For example, the extrasolar planet HD 209458 b has a mass of, while the brown dwarf Gliese 229 b has a mass of.

Theoretical models indicate that if Jupiter had over 40% more mass, the interior would be so compressed that its volume would decrease despite the increasing amount of matter. For smaller changes in its mass, the radius would not change appreciably. As a result, Jupiter is thought to have about as large a diameter as a planet of its composition and evolutionary history can achieve. The process of further shrinkage with increasing mass would continue until appreciable stellar ignition was achieved. Although Jupiter would need to be about 75 times more massive to fuse hydrogen and become a star, its diameter is sufficient as the smallest red dwarf may be only slightly larger in radius than Saturn.

Jupiter radiates more heat than it receives through solar radiation, due to the Kelvin–Helmholtz mechanism within its contracting interior. This process causes Jupiter to shrink by about 1 mm per year. At the time of its formation, Jupiter was hotter and was about twice its current diameter.

Internal structure
Before the early 21st century, most scientists proposed one of two scenarios for the formation of Jupiter. If the planet accreted first as a solid body, it would consist of a dense core, a surrounding layer of fluid metallic hydrogen (with some helium) extending outward to about 80% of the radius of the planet, and an outer atmosphere consisting primarily of molecular hydrogen. Alternatively, if the planet collapsed directly from the gaseous protoplanetary disk, it was expected to completely lack a core, consisting instead of a denser and denser fluid (predominantly molecular and metallic hydrogen) all the way to the centre. Data from the Juno mission showed that Jupiter has a diffuse core that mixes into its mantle, extending for 30–50% of the planet's radius, and comprising heavy elements with a combined mass 7–25 times the Earth. This mixing process could have arisen during formation, while the planet accreted solids and gases from the surrounding nebula. Alternatively, it could have been caused by an impact from a planet of about ten Earth masses a few million years after Jupiter's formation, which would have disrupted an originally compact Jovian core.

Outside the layer of metallic hydrogen lies a transparent interior atmosphere of hydrogen. At this depth, the pressure and temperature are above molecular hydrogen's critical pressure of 1.3 MPa and critical temperature of 33 K. In this state, there are no distinct liquid and gas phases—hydrogen is said to be in a supercritical fluid state. The hydrogen and helium gas extending downward from the cloud layer gradually transitions to a liquid in deeper layers, possibly resembling something akin to an ocean of liquid hydrogen and other supercritical fluids. Physically, the gas gradually becomes hotter and denser as depth increases.

Rain-like droplets of helium and neon precipitate downward through the lower atmosphere, depleting the abundance of these elements in the upper atmosphere. Calculations suggest that helium drops separate from metallic hydrogen at a radius of 60,000 km (11,000 km below the cloud tops) and merge again at 50,000 km (22,000 km beneath the clouds). Rainfalls of diamonds have been suggested to occur, as well as on Saturn and the ice giants Uranus and Neptune.

The temperature and pressure inside Jupiter increase steadily inward as the heat of planetary formation can only escape by convection. At a surface depth where the atmospheric pressure level is 1 bar, the temperature is around 165 K. The region where supercritical hydrogen changes gradually from a molecular fluid to a metallic fluid spans pressure ranges of 500000 - 4000000 bar with temperatures of 5000 - 8400 K, respectively. The temperature of Jupiter's diluted core is estimated to be 20000 K with a pressure of around 40000000 bar.

Atmosphere
The atmosphere of Jupiter is primarily composed of molecular hydrogen and helium, with a smaller amount of other compounds such as water, methane, hydrogen sulfide, and ammonia. Jupiter's atmosphere extends to a depth of approximately 3000 km below the cloud layers.

Cloud layers
Jupiter is perpetually covered with clouds of ammonia crystals, which may contain ammonium hydrosulfide as well. The clouds are located in the tropopause layer of the atmosphere, forming bands at different latitudes, known as tropical regions. These are subdivided into lighter-hued zones and darker belts. The interactions of these conflicting circulation patterns cause storms and turbulence. Wind speeds of 100 m/s are common in zonal jet streams. The zones have been observed to vary in width, colour and intensity from year to year, but they have remained stable enough for scientists to name them.

The cloud layer is about 50 km deep and consists of at least two decks of ammonia clouds: a thin, clearer region on top and a thicker, lower deck. There may be a thin layer of water clouds underlying the ammonia clouds, as suggested by flashes of lightning detected in the atmosphere of Jupiter. These electrical discharges can be up to a thousand times as powerful as lightning on Earth. The water clouds are assumed to generate thunderstorms in the same way as terrestrial thunderstorms, driven by the heat rising from the interior. The Juno mission revealed the presence of "shallow lightning" which originates from ammonia-water clouds relatively high in the atmosphere. These discharges carry "mushballs" of water-ammonia slushes covered in ice, which fall deep into the atmosphere. Upper-atmospheric lightning has been observed in Jupiter's upper atmosphere, bright flashes of light that last around 1.4milliseconds. These are known as "elves" or "sprites" and appear blue or pink due to the hydrogen.

The orange and brown colours in the clouds of Jupiter are caused by upwelling compounds that change colour when they are exposed to ultraviolet light from the Sun. The exact makeup remains uncertain, but the substances are thought to be made up of phosphorus, sulfur or possibly hydrocarbons. These colourful compounds, known as chromophores, mix with the warmer clouds of the lower deck. The light-coloured zones are formed when rising convection cells form crystallising ammonia that hides the chromophores from view.

Jupiter has a low axial tilt, thus ensuring that the poles always receive less solar radiation than the planet's equatorial region. Convection within the interior of the planet transports energy to the poles, balancing out temperatures at the cloud layer.

Great Red Spot and other vortices
A well-known feature of Jupiter is the Great Red Spot, a persistent anticyclonic storm located 22° south of the equator. It was first observed in 1831, and possibly as early as 1665. Images by the Hubble Space Telescope have shown two more "red spots" adjacent to the Great Red Spot. The storm is visible through Earth-based telescopes with an aperture of 12 cm or larger. The oval object rotates counterclockwise, with a period of about six days. The maximum altitude of this storm is about 8 km above the surrounding cloud tops. The Spot's composition and the source of its red colour remain uncertain, although photodissociated ammonia reacting with acetylene is a likely explanation.

The Great Red Spot is larger than the Earth. Mathematical models suggest that the storm is stable and will be a permanent feature of the planet. However, it has significantly decreased in size since its discovery. Initial observations in the late 1800s showed it to be approximately 25500 mi across. By the time of the Voyager flybys in 1979, the storm had a length of 14500 mi and a width of approximately 8000 mi. Hubble observations in 1995 showed it had decreased in size to 13020 mi, and observations in 2009 showed the size to be 11130 mi., the storm was measured at approximately 10250 by, and was decreasing in length by about 580 mi per year. In October 2021, a Juno flyby mission measured the depth of the Great Red Spot, putting it at around 300 - 500 km.

Juno missions show that there are several polar cyclone groups at Jupiter's poles. The northern group contains nine cyclones, with a large one in the centre and eight others around it, while its southern counterpart also consists of a centre vortex but is surrounded by five large storms and a single smaller one for a total of 7 storms. In 2000, an atmospheric feature formed in the southern hemisphere that is similar in appearance to the Great Red Spot, but smaller. This was created when smaller, white oval-shaped storms merged to form a single feature—these three smaller white ovals were formed in 1939–1940. The merged feature was named Oval BA. It has since increased in intensity and changed from white to red, earning it the nickname "Little Red Spot".

In April 2017, a "Great Cold Spot" was discovered in Jupiter's thermosphere at its north pole. This feature is 24000 km across, 12000 km wide, and 200 C-change cooler than surrounding material. While this spot changes form and intensity over the short term, it has maintained its general position in the atmosphere for more than 15 years. It may be a giant vortex similar to the Great Red Spot, and appears to be quasi-stable like the vortices in Earth's thermosphere. This feature may be formed by interactions between charged particles generated from Io and the strong magnetic field of Jupiter, resulting in a redistribution of heat flow.

Magnetosphere
Jupiter's magnetic field is the strongest of any planet in the Solar System, with a dipole moment of 4.170 G that is tilted at an angle of 10.31° to the pole of rotation. The surface magnetic field strength varies from 2 G up to 20 G. This field is thought to be generated by eddy currents—swirling movements of conducting materials—within the fluid, metallic hydrogen core. At about 75 Jupiter radii from the planet, the interaction of the magnetosphere with the solar wind generates a bow shock. Surrounding Jupiter's magnetosphere is a magnetopause, located at the inner edge of a magnetosheath—a region between it and the bow shock. The solar wind interacts with these regions, elongating the magnetosphere on Jupiter's lee side and extending it outward until it nearly reaches the orbit of Saturn. The four largest moons of Jupiter all orbit within the magnetosphere, which protects them from solar wind.

The volcanoes on the moon Io emit large amounts of sulfur dioxide, forming a gas torus along its orbit. The gas is ionized in Jupiter's magnetosphere, producing sulfur and oxygen ions. They, together with hydrogen ions originating from the atmosphere of Jupiter, form a plasma sheet in Jupiter's equatorial plane. The plasma in the sheet co-rotates with the planet, causing deformation of the dipole magnetic field into that of a magnetodisk. Electrons within the plasma sheet generate a strong radio signature, with short, superimposed bursts in the range of 0.6–30 MHz that are detectable from Earth with consumer-grade shortwave radio receivers. As Io moves through this torus, the interaction generates Alfvén waves that carry ionized matter into the polar regions of Jupiter. As a result, radio waves are generated through a cyclotron maser mechanism, and the energy is transmitted out along a cone-shaped surface. When Earth intersects this cone, the radio emissions from Jupiter can exceed the radio output of the Sun.

Planetary rings
Jupiter has a faint planetary ring system composed of three main segments: an inner torus of particles known as the halo, a relatively bright main ring, and an outer gossamer ring. These rings appear to be made of dust, whereas Saturn's rings are made of ice. The main ring is most likely made out of material ejected from the satellites Adrastea and Metis, which is drawn into Jupiter because of the planet's strong gravitational influence. New material is added by additional impacts. In a similar way, the moons Thebe and Amalthea are believed to produce the two distinct components of the dusty gossamer ring. There is evidence of a fourth ring that may consist of collisional debris from Amalthea that is strung along the same moon's orbit.

Orbit and rotation
Jupiter is the only planet whose barycentre with the Sun lies outside the volume of the Sun, though by only 7% of the Sun's radius. The average distance between Jupiter and the Sun is 778 million km and it completes an orbit every 11.86 years. This is approximately two-fifths the orbital period of Saturn, forming a near orbital resonance. The orbital plane of Jupiter is inclined 1.30° compared to Earth. Because the eccentricity of its orbit is 0.049, Jupiter is slightly over 75 million km nearer the Sun at perihelion than aphelion, which means that its orbit is nearly circular. This low eccentricity is at odds with exoplanet discoveries, which have revealed Jupiter-sized planets with very high eccentricities. Models suggest this may be due to there being only two giant planets in our Solar System, as the presence of a third or more giant planets tends to induce larger eccentricities.

The axial tilt of Jupiter is relatively small, only 3.13°, so its seasons are insignificant compared to those of Earth and Mars.

Jupiter's rotation is the fastest of all the Solar System's planets, completing a rotation on its axis in slightly less than ten hours; this creates an equatorial bulge easily seen through an amateur telescope. Because Jupiter is not a solid body, its upper atmosphere undergoes differential rotation. The rotation of Jupiter's polar atmosphere is about 5 minutes longer than that of the equatorial atmosphere. The planet is an oblate spheroid, meaning that the diameter across its equator is longer than the diameter measured between its poles. On Jupiter, the equatorial diameter is 9276 km longer than the polar diameter.

Three systems are used as frames of reference for tracking planetary rotation, particularly when graphing the motion of atmospheric features. System I applies to latitudes from 7° N to 7° S; its period is the planet's shortest, at 9h 50 m 30.0s. System II applies at latitudes north and south of these; its period is 9h 55 m 40.6s. System III was defined by radio astronomers and corresponds to the rotation of the planet's magnetosphere; its period is Jupiter's official rotation.

Observation
Jupiter is usually the fourth brightest object in the sky (after the Sun, the Moon, and Venus), although at opposition Mars can appear brighter than Jupiter. Depending on Jupiter's position with respect to the Earth, it can vary in visual magnitude from as bright as −2.94 at opposition down to −1.66 during conjunction with the Sun. The mean apparent magnitude is −2.20 with a standard deviation of 0.33. The angular diameter of Jupiter likewise varies from 50.1 to 30.5 arc seconds. Favourable oppositions occur when Jupiter is passing through the perihelion of its orbit, bringing it closer to Earth. Near opposition, Jupiter will appear to go into retrograde motion for a period of about 121 days, moving backward through an angle of 9.9° before returning to prograde movement.

Because the orbit of Jupiter is outside that of Earth, the phase angle of Jupiter as viewed from Earth is always less than 11.5°; thus, Jupiter always appears nearly fully illuminated when viewed through Earth-based telescopes. It was only during spacecraft missions to Jupiter that crescent views of the planet were obtained. A small telescope will usually show Jupiter's four Galilean moons and the prominent cloud belts across Jupiter's atmosphere. A larger telescope with an aperture of 4 - 6 in will show Jupiter's Great Red Spot when it faces Earth.

Pre-telescopic research
Observation of Jupiter dates back to at least the Babylonian astronomers of the 7th or 8th century BC. The ancient Chinese knew Jupiter as the "Suì Star" and established their cycle of 12 earthly branches based on the approximate number of years it takes Jupiter to rotate around the Sun; the Chinese language still uses its name (simplified as ) when referring to years of age. By the 4th century BC, these observations had developed into the Chinese zodiac, and each year became associated with a Tai Sui star and god controlling the region of the heavens opposite Jupiter's position in the night sky. These beliefs survive in some Taoist religious practices and in the East Asian zodiac's twelve animals. The Chinese historian Xi Zezong has claimed that Gan De, an ancient Chinese astronomer, reported a small star "in alliance" with the planet, which may indicate a sighting of one of Jupiter's moons with the unaided eye. If true, this would predate Galileo's discovery by nearly two millennia.

A 2016 paper reports that trapezoidal rule was used by Babylonians before 50 BC for integrating the velocity of Jupiter along the ecliptic. In his 2nd century work the Almagest, the Hellenistic astronomer Claudius Ptolemaeus constructed a geocentric planetary model based on deferents and epicycles to explain Jupiter's motion relative to Earth, giving its orbital period around Earth as 4332.38 days, or 11.86 years.

Ground-based telescope research
In 1610, Italian polymath Galileo Galilei discovered the four largest moons of Jupiter (now known as the Galilean moons) using a telescope. This is thought to be the first telescopic observation of moons other than Earth's. Just one day after Galileo, Simon Marius independently discovered moons around Jupiter, though he did not publish his discovery in a book until 1614. It was Marius's names for the major moons, however, that stuck: Io, Europa, Ganymede, and Callisto. The discovery was a major point in favour of Copernicus' heliocentric theory of the motions of the planets; Galileo's outspoken support of the Copernican theory led to him being tried and condemned by the Inquisition.

In the autumn of 1639, the Neapolitan optician Francesco Fontana tested a 22-palm telescope of his own making and discovered the characteristic bands of the planet's atmosphere.

During the 1660s, Giovanni Cassini used a new telescope to discover spots in Jupiter's atmosphere, observe that the planet appeared oblate, and estimate its rotation period. In 1692, Cassini noticed that the atmosphere undergoes a differential rotation.

The Great Red Spot may have been observed as early as 1664 by Robert Hooke and in 1665 by Cassini, although this is disputed. The pharmacist Heinrich Schwabe produced the earliest known drawing to show details of the Great Red Spot in 1831. The Red Spot was reportedly lost from sight on several occasions between 1665 and 1708 before becoming quite conspicuous in 1878. It was recorded as fading again in 1883 and at the start of the 20th century.

Both Giovanni Borelli and Cassini made careful tables of the motions of Jupiter's moons, which allowed predictions of when the moons would pass before or behind the planet. By the 1670s, Cassini observed that when Jupiter was on the opposite side of the Sun from Earth, these events would occur about 17 minutes later than expected. Ole Rømer deduced that light does not travel instantaneously (a conclusion that Cassini had earlier rejected), and this timing discrepancy was used to estimate the speed of light.

In 1892, E. E. Barnard observed a fifth satellite of Jupiter with the 36 in refractor at Lick Observatory in California. This moon was later named Amalthea. It was the last planetary moon to be discovered directly by a visual observer through a telescope. An additional eight satellites were discovered before the flyby of the Voyager 1 probe in 1979. In 1932, Rupert Wildt identified absorption bands of ammonia and methane in the spectra of Jupiter. Three long-lived anticyclonic features called "white ovals" were observed in 1938. For several decades, they remained as separate features in the atmosphere, sometimes approaching each other but never merging. Finally, two of the ovals merged in 1998, then absorbed the third in 2000, becoming Oval BA.

Radiotelescope research
In 1955, Bernard Burke and Kenneth Franklin discovered that Jupiter emits bursts of radio waves at a frequency of 22.2 MHz. The period of these bursts matched the rotation of the planet, and they used this information to determine a more precise value for Jupiter's rotation rate. Radio bursts from Jupiter were found to come in two forms: long bursts (or L-bursts) lasting up to several seconds, and short bursts (or S-bursts) lasting less than a hundredth of a second.

Scientists have discovered three forms of radio signals transmitted from Jupiter:
 * Decametric radio bursts (with a wavelength of tens of metres) vary with the rotation of Jupiter, and are influenced by the interaction of Io with Jupiter's magnetic field.
 * Decimetric radio emission (with wavelengths measured in centimetres) was first observed by Frank Drake and Hein Hvatum in 1959. The origin of this signal is a torus-shaped belt around Jupiter's equator, which generates cyclotron radiation from electrons that are accelerated in Jupiter's magnetic field.
 * Thermal radiation is produced by heat in the atmosphere of Jupiter.

Exploration
Jupiter has been visited by automated spacecraft since 1973, when the space probe Pioneer 10 passed close enough to Jupiter to send back revelations about its properties and phenomena. Missions to Jupiter are accomplished at a cost in energy, which is described by the net change in velocity of the spacecraft, or delta-v. Entering a Hohmann transfer orbit from Earth to Jupiter from low Earth orbit requires a delta-v of 6.3 km/s, which is comparable to the 9.7 km/s delta-v needed to reach low Earth orbit. Gravity assists through planetary flybys can be used to reduce the energy required to reach Jupiter.

Flyby missions
Beginning in 1973, several spacecraft performed planetary flyby manoeuvres that brought them within the observation range of Jupiter. The Pioneer missions obtained the first close-up images of Jupiter's atmosphere and several of its moons. They discovered that the radiation fields near the planet were much stronger than expected, but both spacecraft managed to survive in that environment. The trajectories of these spacecraft were used to refine the mass estimates of the Jovian system. Radio occultations by the planet resulted in better measurements of Jupiter's diameter and the amount of polar flattening.

Six years later, the Voyager missions vastly improved the understanding of the Galilean moons and discovered Jupiter's rings. They also confirmed that the Great Red Spot was anticyclonic. Comparison of images showed that the Spot had changed hues since the Pioneer missions, turning from orange to dark brown. A torus of ionized atoms was discovered along Io's orbital path, which were found to come from erupting volcanoes on the moon's surface. As the spacecraft passed behind the planet, it observed flashes of lightning in the night side atmosphere.

The next mission to encounter Jupiter was the Ulysses solar probe. In February 1992, it performed a flyby manoeuvre to attain a polar orbit around the Sun. During this pass, the spacecraft studied Jupiter's magnetosphere, although it had no cameras to photograph the planet. The spacecraft passed by Jupiter six years later, this time at a much greater distance.

In 2000, the Cassini probe flew by Jupiter on its way to Saturn, and provided higher-resolution images.

The New Horizons probe flew by Jupiter in 2007 for a gravity assist en route to Pluto. The probe's cameras measured plasma output from volcanoes on Io and studied all four Galilean moons in detail.

Galileo mission
The first spacecraft to orbit Jupiter was the Galileo mission, which reached the planet on December 7, 1995. It remained in orbit for over seven years, conducting multiple flybys of all the Galilean moons and Amalthea. The spacecraft also witnessed the impact of Comet Shoemaker–Levy 9 when it collided with Jupiter in 1994. Some of the goals for the mission were thwarted due to a malfunction in Galileo's high-gain antenna.

A 340-kilogram titanium atmospheric probe was released from the spacecraft in July 1995, entering Jupiter's atmosphere on December 7. It parachuted through 150 km of the atmosphere at a speed of about 2,575 km/h and collected data for 57.6 minutes until the spacecraft was destroyed. The Galileo orbiter itself experienced a more rapid version of the same fate when it was deliberately steered into the planet on September 21, 2003. NASA destroyed the spacecraft to avoid any possibility of the spacecraft crashing into and possibly contaminating the moon Europa, which may harbour life.

Data from this mission revealed that hydrogen composes up to 90% of Jupiter's atmosphere. The recorded temperature was more than 300 °C (570 °F), and the wind speed measured more than 644 km/h (>400 mph) before the probes vaporized.

Juno mission
NASA's Juno mission arrived at Jupiter on July 4, 2016, with the goal of studying the planet in detail from a polar orbit. The spacecraft was originally intended to orbit Jupiter thirty-seven times over a period of twenty months. During the mission, the spacecraft will be exposed to high levels of radiation from Jupiter's magnetosphere, which may cause the failure of certain instruments. On August 27, 2016, the spacecraft completed its first flyby of Jupiter and sent back the first-ever images of Jupiter's north pole.

Juno completed 12 orbits before the end of its budgeted mission plan, ending in July 2018. In June of that year, NASA extended the mission operations plan to July 2021, and in January of that year the mission was extended to September 2025 with four lunar flybys: one of Ganymede, one of Europa, and two of Io. When Juno reaches the end of the mission, it will perform a controlled deorbit and disintegrate into Jupiter's atmosphere. This will avoid the risk of collision with Jupiter's moons.

Cancelled missions and future plans
There is great interest in missions to study Jupiter's larger icy moons, which may have subsurface liquid oceans. Funding difficulties have delayed progress, causing NASA's JIMO (Jupiter Icy Moons Orbiter) to be cancelled in 2005. A subsequent proposal was developed for a joint NASA/ESA mission called EJSM/Laplace, with a provisional launch date around 2020. EJSM/Laplace would have consisted of the NASA-led Jupiter Europa Orbiter and the ESA-led Jupiter Ganymede Orbiter. However, the ESA formally ended the partnership in April 2011, citing budget issues at NASA and the consequences on the mission timetable. Instead, ESA planned to go ahead with a European-only mission to compete in its L1 Cosmic Vision selection. These plans have been realized as the European Space Agency's Jupiter Icy Moon Explorer (JUICE), launched on April 14, 2023, followed by NASA's Europa Clipper mission, scheduled for launch in 2024. Other proposed missions include the Chinese National Space Administration's Tianwen-4 mission which aims to launch an orbiter to the Jovian system and possibly Callisto around 2035, and CNSA's Interstellar Express and NASA's Interstellar Probe, which would both use Jupiter's gravity to help them reach the edges of the heliosphere.

Moons
Jupiter has 95 known natural satellites, and it is likely that this number would go up in the future due to improved instrumentation. Of these, 79 are less than 10 km in diameter. The four largest moons are Ganymede, Callisto, Io, and Europa (in order of decreasing size), collectively known as the "Galilean moons", and are visible from Earth with binoculars on a clear night.

Galilean moons
The moons discovered by Galileo—Io, Europa, Ganymede, and Callisto—are among the largest in the Solar System. The orbits of Io, Europa, and Ganymede form a pattern known as a Laplace resonance; for every four orbits that Io makes around Jupiter, Europa makes exactly two orbits and Ganymede makes exactly one. This resonance causes the gravitational effects of the three large moons to distort their orbits into elliptical shapes, because each moon receives an extra tug from its neighbours at the same point in every orbit it makes. The tidal force from Jupiter, on the other hand, works to circularize their orbits.

The eccentricity of their orbits causes regular flexing of the three moons' shapes, with Jupiter's gravity stretching them out as they approach it and allowing them to spring back to more spherical shapes as they swing away. The friction created by this tidal flexing generates heat in the interior of the moons. This is seen most dramatically in the volcanic activity of Io (which is subject to the strongest tidal forces), and to a lesser degree in the geological youth of Europa's surface, which indicates recent resurfacing of the moon's exterior.

Classification
Jupiter's moons were traditionally classified into four groups of four, based on their similar orbital elements. This picture has been complicated by the discovery of numerous small outer moons since 1999. Jupiter's moons are currently divided into several different groups, although there are several moons which are not part of any group.

The eight innermost regular moons, which have nearly circular orbits near the plane of Jupiter's equator, are thought to have formed alongside Jupiter, whilst the remainder are irregular moons and are thought to be captured asteroids or fragments of captured asteroids. The irregular moons within each group may have a common origin, perhaps as a larger moon or captured body that broke up.

Interaction with the Solar System
As the most massive of the eight planets, the gravitational influence of Jupiter has helped shape the Solar System. With the exception of Mercury, the orbits of the system's planets lie closer to Jupiter's orbital plane than the Sun's equatorial plane. The Kirkwood gaps in the asteroid belt are mostly caused by Jupiter, and the planet may have been responsible for the purported Late Heavy Bombardment in the inner Solar System's history.

In addition to its moons, Jupiter's gravitational field controls numerous asteroids that have settled around the Lagrangian points that precede and follow the planet in its orbit around the Sun. These are known as the Trojan asteroids, and are divided into Greek and Trojan "camps" to honour the Iliad. The first of these, 588 Achilles, was discovered by Max Wolf in 1906; since then more than two thousand have been discovered. The largest is 624 Hektor.

The Jupiter family is defined as comets that have a semi-major axis smaller than Jupiter's; most short-period comets belong to this group. Members of the Jupiter family are thought to form in the Kuiper belt outside the orbit of Neptune. During close encounters with Jupiter, they are perturbed into orbits with a smaller period, which then becomes circularized by regular gravitational interactions with the Sun and Jupiter.

Impacts
Jupiter has been called the Solar System's vacuum cleaner because of its immense gravity well and location near the inner Solar System. There are more impacts on Jupiter, such as comets, than on any other planet in the Solar System. For example, Jupiter experiences about 200 times more asteroid and comet impacts than Earth. In the past, scientists believed that Jupiter partially shielded the inner system from cometary bombardment. However, computer simulations in 2008 suggest that Jupiter does not cause a net decrease in the number of comets that pass through the inner Solar System, as its gravity perturbs their orbits inward roughly as often as it accretes or ejects them. This topic remains controversial among scientists, as some think it draws comets towards Earth from the Kuiper belt, while others believe that Jupiter protects Earth from the Oort cloud.

In July 1994, the Comet Shoemaker–Levy 9 comet collided with Jupiter. The impacts were closely observed by observatories around the world, including the Hubble Space Telescope and Galileo spacecraft. The event was widely covered by the media.

Surveys of early astronomical records and drawings produced eight examples of potential impact observations between 1664 and 1839. However, a 1997 review determined that these observations had little or no possibility of being the results of impacts. Further investigation by this team revealed a dark surface feature discovered by astronomer Giovanni Cassini in 1690 may have been an impact scar.

In culture
The existence of the planet Jupiter has been known since ancient times. It is visible to the naked eye in the night sky and can occasionally be seen in the daytime when the Sun is low. To the Babylonians, this planet represented their god Marduk, chief of their pantheon from the Hammurabi period. They used Jupiter's roughly 12-year orbit along the ecliptic to define the constellations of their zodiac.

The mythical Greek name for this planet is Zeus (Ζεύς), also referred to as Dias (Δίας), the planetary name of which is retained in modern Greek. The ancient Greeks knew the planet as Phaethon (Φαέθων), meaning "shining one" or "blazing star". The Greek myths of Zeus from the Homeric period showed particular similarities to certain Near-Eastern gods, including the Semitic El and Baal, the Sumerian Enlil, and the Babylonian god Marduk. The association between the planet and the Greek deity Zeus was drawn from Near Eastern influences and was fully established by the fourth century BC, as documented in the Epinomis of Plato and his contemporaries.

The god Jupiter is the Roman counterpart of Zeus, and he is the principal god of Roman mythology. The Romans originally called Jupiter the "star of Jupiter" (Iuppiter Stella), as they believed it to be sacred to its namesake god. This name comes from the Proto-Indo-European vocative compound *Dyēu-pəter (nominative: *Dyēus-pətēr, meaning "Father Sky-God", or "Father Day-God"). As the supreme god of the Roman pantheon, Jupiter was the god of thunder, lightning, and storms, and was called the god of light and sky.

In Vedic astrology, Hindu astrologers named the planet after Brihaspati, the religious teacher of the gods, and often called it "Guru", which means the "Teacher". In Central Asian Turkic myths, Jupiter is called Erendiz or Erentüz, from eren (of uncertain meaning) and yultuz ("star"). The Turks calculated the period of the orbit of Jupiter as 11 years and 300 days. They believed that some social and natural events connected to Erentüz's movements in the sky. The Chinese, Vietnamese, Koreans, and Japanese called it the "wood star", based on the Chinese Five Elements. In China, it became known as the "Year-star" (Sui-sing), as Chinese astronomers noted that it jumped one zodiac constellation each year (with corrections). In some ancient Chinese writings, the years were, in principle, named in correlation with the Jovian zodiac signs.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: Jupiter


text:
Talk:The Myth of Sisyphus

Suicide
In the article it says that Camus discusses the question of suicide, and even says "Given such a futile world, he asks, what is the alternative to suicide?" However, I could find no suggestion of suicide in Camus' essay, so can someone please say why they get the idea that there is no alternative to suicide from Camus' words? - El Zahir

To El Zahir: It doesn't refer to suicide, and in fact the implication of that statement shows what is fundamentally an extremely poor understanding of the text. As Camus explains in "The Rebel," suicide is the worst possible thing we can do. If our life is all we have and it is for us to nobly strive to succeed in the face of a somewhat nihilistic universe, suicide becomes the ultimate form of cowardice. That is why I removed that statement from the article. - Mike

To Mike: Thanks for the info, I'm glad I'm not the only one who found that statement untrue, and thanks for fixing the article. - El Zahir

 * Camus asks and answers the question of suicide in chapter 1 of his essay; the last chapter, the only one that mentions Sisyphus and that is often reproduced on the internet, indeed does not refer to suicide. AxelBoldt 02:19, 5 August 2007 (UTC)

"Taking the absurd seriously means acknowledging the contradiction between the desire of human reason and the unreasonable world. Suicide, then, also must be rejected: without man, the absurd cannot exist." The "then" in the second sentence seems to indicate that it follows from the first sentence. It doesn't to me, or the connection is at least insufficiently well explained. - Phil

Free Will
Question: How does Camu deny free will in this essay, or in the work at large? In particular he refers to our personal fate being created by us and that we are masters of our days.

"[...]in that slight pivoting he contemplates that series of unrelated actions which become his fate, created by him, combined under his memory's eye and soon sealed by his death."

If nobody can point this out I'll delete the offending passage. -Frank.

Tantalus
Removed references to Tantalus. They belong on a page about Tantalus, and possibly even Sisyphus, but not on this page, which is about Albert Camus' essay "The Myth of Sisyphus". To my knowledge, Camus does not mention Tantalus in the essay. Graham Chapman

A fair and interesting point, Graham. However mythology and philosophy are both comparative disciplines. The fact that Sisyphus was Camus' chosen metaphor as opposed to Tantalus is, to my mind, revealing of Camus' use of the Sisypharean myth to explore the existential nature of human experience. user:sjc

 * I agree that mythology and philosophy are difficult to separate at times, but this page is about Albert Camus'essay (for example, notice that I don't expand on the philosophy of the absurd, I link to it because it is a separate topic). Now, the difference between the title of his essay "The Myth of Sisyphus" and the Greek myth of the same name is only one of capitalisation, i.e. the Greek myth could be titled "The myth of Sisyphus". You could quite reasonably put such an article on the same page as this by separating it by a horizontal line - from what I have seen, this is the Wikipedia convention for handling alternative meanings of the same term.

 * If you were to put comparisons with Tantalus on such a page, OR if you put it on a page titled "Sisyphus" then it would help to explain the mythology and would make sense. However, IMHO, to preserve a NPOV for the part of this page describing Camus' essay as a page in an encyclopedia, this page is about Camus'essay, and references to additional characters from Greek mythology might shed light on the mythology, but only serves to obscure the essay. There's also the viewpoint that such discussion belongs in a philosophical treatise, but I'm inclined not to argue that one because I'm not qualified.
 * Graham Chapman

I'm not really disagreeing with you, Graham, otherwise I would simply have reinstated the Tantalus stuff without comment. However, you should be aware that a lot of academic criticism which deals with the ideistic nature of the Sisypharean torment is couched explicitly in terms of explaining this fundamental dichotomy between it and the holistic nature of the Tantalic torment. Like the stone, this Tantalus stuff will inexorably return, just mark my words... :-) sjc

 * Fair enough. I see from various sites on the Internet that they are often compared - http://www.mythweb.com/today/today03.html and http://www.zipcon.net/~parallax/tns.html, and presumably heaps more. Thus having shown my ignorance on this point, I'll stop arguing. Thanks for having given me ideistic and holistic to ponder on. I'll just go away for a few days until my head stops hurting...!

Minor point, but if Sisyphus was pushed by being blinded, how could he see the boulder roll down the hill as in the next comment? I'm a Wikipedia newbie, so I don't want to touch the entry, but could someone else please review that?

Perhaps a reference to Tantalus at the end of the article as it does seem to be integrated in literary comparisons and chit chat about Sisyphus. It's always good to see at least a few references to similar concepts in other works.

The explanation of who Sisyphus is on this page is different from the explanation on the Sisyphus page--here it says he was condemned because of his extraordinary wisdom, whereas on the Sisyphus page it says the reason is "obscure." Perhaps somebody with more knowledge on the subject than I should resolve this difference.

"Sisyphus was a character in Greek mythology who upset the gods with his extraordinary wisdom." Would a second look at the original myth, as Camus knew it, add depth to this assessment of the essay? BtW Camus calls Sisyphus "the absurd hero" not the absurd man. Is there any perceptible difference? --Wetman 06:02, 1 Feb 2005 (UTC)

Someone should clarify how faith is characteristic of existentialism. To me, this statement is far too generalized, especially when considering that the most well-known branch of existentialism is the atheistic form of Sartre (and, given that he saw all existence as contingent, how could we say that his philosophy was characterized by any sort of faith?). If somebody could explain this, I'll keep in the parenthetical. However, it seems to me like it was unnescessarily added in order to differentiate Camus from Sartre, which is not needed in this article (at least as it currently stands), and so, I plan on deleting it soon. -Tinpatches 03:37, 21 May 2006 (UTC)tinpatches

Camus' inductive logic
This seems to be Camus' inductive proof for absurdism. It's great to get a new perspective on this philolgical gem. — Preceding unsigned comment added by 84.151.61.125 (talk) 18:42, 29 September 2005 (UTC)

Link change
Please note that the previous link to the Camus' essay was dead, and it has sinced been changed.

Sisyphus a good example?
This is not related to writing the article. Was Sisyphus the best example to choose? Anyone familiar with Greek myth knows that the story always changes. A contemporary individual hearing this story, contemplating himself in place of Sisyphus would likely hold out hope that some other god would come along and save him from his perpetual task, given the multitude of arcing stories present in other myths - they would imagine Sisyphus to hold onto a similar hope. I guess it is only now 2000 years later that the myth is sealed in stone, and can be used as an example by Camus. — BRIAN 0918 • 2007-11-15 17:29Z

Vandalism?
"How ironic that Camus rejected this emphatically only to hang himself in 1959 with cement encased pasta. He predated Lenny Bruce and Brittany Spears but is considered equally influential, at least in philosophical circles."

Huh? Camus died in a car accident. Could someone with a better grasp of Camus than me fix this article? —Preceding unsigned comment added by 192.203.187.55 (talk) 21:20, 11 March 2008 (UTC)

I am soooooo confused... (Pt. deux)
For cross-reference purposes to http://en.wikipedia.org/wiki/Absurdism:

http://en.wikipedia.org/wiki/The_Myth_of_Sisyphus See end of paragraph 9: "However, the absurd can never be accepted: it requires constant confrontation, constant revolt." To deal with it well, should I ACCEPT absurdity (as is mentioned many times in this article) or REVOLT against it (as is contradictorily mentioned twice)? I think the wording needs to be changed: Camus ACKNOWLEDGED the Absurd, ACCEPTED its reality and advocated REVOLT against it. The 'authors' of this page and the one cited above seem to be at odds; I'm assuming they are done by two different people/groups. What did Camus, Kierkegaard and Nietzsche have to say about this subject? Are there any other philosophers who have addressed this issue?
 * interesting difference: Acceptance versus Acknowledged, can you both accept and revolt against the absurd? Pohick2 (talk)

 * Isn't that the point? Its absurd, really. You accept it, but you revolt against it. Read the Stranger, for example. — Preceding unsigned comment added by 129.8.206.129 (talk) 23:48, 9 December 2012 (UTC)

Reception?
Why was this essay notable? What was its reception? Has it been criticised? Fences and windows (talk) 22:13, 27 April 2009 (UTC)

Contradictions regarding acceptance of the absurd
The summary in the article seems to contradict itself.

 * The summary of chapter 1 says that "the absurd can never be accepted" (my emphasis).
 * The summary of chapter 4 says that Sisyphus "is freed to realize the absurdity of his situation and to reach a state of contented acceptance" (my emphasis).

I have not read Camus' work, so I do not know how to interpret this. I just note that the above seems obviously contradictory. Someone who knows the subject better might consider revising the wording. SpectrumDT (talk) 08:49, 24 October 2016 (UTC)

Note the title, this might help resolve your dilemma. — Preceding unsigned comment added by 73.199.30.236 (talk) 12:53, 10 September 2018 (UTC)

Preface 1955
I was wondering if it would be relevant to cite the preface to the 1955 version that Camus wrote in Paris. He talks about suicide in the preface, and wanted to hear your thoughts on its relevance - Bwash1unh

title: Talk:The Myth of Sisyphus


text:
Phillis Wheatley

Phillis Wheatley Peters, also spelled Phyllis and Wheatly (c. 1753 – December 5, 1784) was an American author who is considered the first African-American author of a published book of poetry. Born in West Africa, she was kidnapped and subsequently sold into slavery at the age of seven or eight and transported to North America, where she was bought by the Wheatley family of Boston. After she learned to read and write, they encouraged her poetry when they saw her talent.

On a 1773 trip to London with the Wheatleys' son, seeking publication of her work, Wheatley met prominent people who became her patrons. The publication in London of her Poems on Various Subjects, Religious and Moral on September 1, 1773, brought her fame both in England and the American colonies. Prominent figures, such as George Washington, praised her work. A few years later, African-American poet Jupiter Hammon praised her work in a poem of his own.

Wheatley was emancipated by the Wheatleys shortly after the publication of her book of poems. The Wheatleys died soon thereafter and Phillis Wheatley married John Peters, a poor grocer. They lost three children, who all died young. Wheatley-Peters died in poverty and obscurity at the age of 31.

Early life
Although the date and place of her birth are not documented, scholars believe that Wheatley was born in 1753 in West Africa, most likely in present-day Gambia or Senegal. She was sold by a local chief to a visiting trader, who took her to Boston in the then British Colony of Massachusetts, on July 11, 1761, on a slave ship called The Phillis. The vessel was owned by Timothy Fitch and captained by Peter Gwinn.

On arrival in Boston, Wheatley was bought by the wealthy Boston merchant and tailor John Wheatley as a slave for his wife Susanna. The Wheatleys named her Phillis, after the ship that had transported her to North America. She was given their last name of Wheatley, as was a common custom if any surname was used for enslaved people.

The Wheatleys' 18-year-old daughter, Mary, was Phillis's first tutor in reading and writing. Their son, Nathaniel, also tutored her. John Wheatley was known as a progressive throughout New England; his family afforded Phillis an unprecedented education for an enslaved person, and one unusual for a woman of any race at the time. By the age of 12, Phillis was reading Greek and Latin classics in their original languages, as well as difficult passages from the Bible. At the age of 14, she wrote her first poem, "To the University of Cambridge [Harvard], in New England".

Recognizing her literary ability, the Wheatley family supported Phillis's education and left household labor to their other domestic enslaved workers. The Wheatleys often exhibited Phillis's abilities to friends and family. Strongly influenced by her readings of the works of Alexander Pope, John Milton, Homer, Horace and Virgil, Phillis began to write poetry.

Later life
In 1773, at the age of 20, Phillis accompanied Nathaniel Wheatley to London in part for her health (she suffered from chronic asthma), but primarily because Susanna believed Phillis would have a better chance of publishing her book of poems there than in the colonies. Phillis had an audience with Frederick Bull, who was the Lord Mayor of London, and other prominent members of British society. (An audience with King George III was arranged, but Phillis had returned to Boston before it could take place.) Selina Hastings, Countess of Huntingdon, became interested in the talented young African woman and subsidized the publication of Wheatley's volume of poems, which appeared in London in the summer of 1773. As Hastings was ill, the two never met.

After Phillis's book was published, by November 1773, the Wheatleys manumitted Phillis. Susanna Wheatley died in the spring of 1774, and John in 1778. Shortly after, Phillis met and married John Peters, an impoverished free black grocer. They lived in poor conditions and two of their babies died.

John was improvident and was imprisoned for debt in 1784. With a sickly infant son to provide for, Phillis became a scullery maid at a boarding house, doing work she had never done before; she developed pneumonia and died on December 5, 1784, at the age of 31, after giving birth to a daughter, who died the same day as her.

Other writings
Wheatley wrote a letter to Reverend Samson Occom, commending him on his ideas and beliefs stating that enslaved people should be given their natural-born rights in America. Wheatley also exchanged letters with the British philanthropist John Thornton, who discussed Wheatley and her poetry in correspondence with John Newton. Through her letter writing, Wheatley was able to express her thoughts, comments and concerns to others.

In 1775, she sent a copy of a poem entitled "To His Excellency, George Washington" to the then-military general. The following year, Washington invited Wheatley to visit him at his headquarters in Cambridge, Massachusetts, which she did in March 1776. Thomas Paine republished the poem in the Pennsylvania Gazette in April 1776.

In 1779, Wheatley issued a proposal for a second volume of poems but was unable to publish it because she had lost her patrons after her emancipation; publication of books was often based on gaining subscriptions for guaranteed sales beforehand. The American Revolutionary War (1775–1783) was also a factor. However, some of her poems that were to be included in the second volume were later published in pamphlets and newspapers.

Poetry
In 1768, Wheatley wrote "To the King's Most Excellent Majesty", in which she praised King George III for repealing the Stamp Act. But while discussing the idea of freedom, Wheatley was able subtly to raise the idea of freedom for enslaved subjects of the king as well:

"May George, beloved by all the nations round, Live with heav’ns choicest constant blessings crown’d! Great God, direct, and guard him from on high, And from his head let ev’ry evil fly! And may each clime with equal gladness see A monarch’s smile can set his subjects free!"

As the American Revolution gained strength, Wheatley's writing turned to themes that expressed ideas of the rebellious colonists.

In 1770, she wrote a poetic tribute to the evangelist George Whitefield. Her poetry expressed Christian themes, and many poems were dedicated to famous figures. Over one-third consist of elegies, the remainder being on religious, classical and abstract themes. She seldom referred to her own life in her poems. One example of a poem on slavery is "On being brought from Africa to America":

"Twas mercy brought me from my Pagan land, Taught my benighted soul to understand That there's a God, that there's a Saviour too: Once I redemption neither sought nor knew. Some view our sable race with scornful eye, 'Their colour is a diabolic dye.' Remember, Christians, Negroes, black as Cain, May be refin'd, and join th' angelic train."

Many colonists found it difficult to believe that an African slave was writing "excellent" poetry. Wheatley had to defend her authorship of her poetry in court in 1772. She was examined by a group of Boston luminaries, including John Erving, Reverend Charles Chauncey, John Hancock, Thomas Hutchinson, the governor of Massachusetts, and his lieutenant governor Andrew Oliver. They concluded she had written the poems ascribed to her and signed an attestation, which was included in the preface of her book of collected works: Poems on Various Subjects, Religious and Moral, published in London in 1773. Publishers in Boston had declined to publish it, but her work was of great interest to influential people in London.

There, Selina, Countess of Huntingdon and the Earl of Dartmouth acted as patrons to help Wheatley gain publication. Her poetry received comment in The London Magazine in 1773, which published her poem "Hymn to the Morning" as a specimen of her work, writing: "[t]hese poems display no astonishing power of genius; but when we consider them as the productions of a young untutored African, who wrote them after six months casual study of the English language and of writing, we cannot suppress our admiration of talents so vigorous and lively." Poems on Various Subjects, Religious and Moral was printed in 11 editions until 1816.

In 1778, the African-American poet Jupiter Hammon wrote an ode to Wheatley ("An Address to Miss Phillis Wheatley"). His master Lloyd had temporarily moved with his slaves to Hartford, Connecticut, during the Revolutionary War. Hammon thought that Wheatley had succumbed to what he believed were pagan influences in her writing, and so his "Address" consisted of 21 rhyming quatrains, each accompanied by a related Bible verse, that he thought would compel Wheatley to return to a Christian path in life.

In 1838, Boston-based publisher and abolitionist Isaac Knapp published a collection of Wheatley's poetry, along with that of enslaved North Carolina poet George Moses Horton, under the title ''Memoir and Poems of Phillis Wheatley, A Native African and a Slave. Also, Poems by a Slave''. Wheatley's memoir was earlier published in 1834 by Geo W. Light but did not include poems by Horton.

Thomas Jefferson, in his book Notes on the State of Virginia, was unwilling to acknowledge the value of her work or the work of any black poet. He wrote:"Misery is often the parent of the most affecting touches in poetry. Among the blacks is misery enough, God knows, but no poetry. Love is the peculiar oestrum of the poet. Their love is ardent, but it kindles the senses only, not the imagination. Religion indeed has produced a Phyllis Whately [sic] but it could not produce a poet. The compositions published under her name are below the dignity of criticism."

Style, structure, and influences on poetry
Wheatley believed that the power of poetry was immeasurable. John C. Shields, noting that her poetry did not simply reflect the literature she read but was based on her personal ideas and beliefs, writes: "Wheatley had more in mind than simple conformity. It will be shown later that her allusions to the sun god and to the goddess of the morn, always appearing as they do here in close association with her quest for poetic inspiration, are of central importance to her." This poem is arranged into three stanzas of four lines in iambic tetrameter, followed by a concluding couplet in iambic pentameter. The rhyme scheme is ABABCC. Shields sums up her writing as being "contemplative and reflective rather than brilliant and shimmering."

She repeated three primary elements: Christianity, classicism and hierophantic solar worship. The hierophantic solar worship was part of what she brought with her from Africa; the worship of sun gods is expressed as part of her African culture, which may be why she used so many different words for the sun. For instance, she uses Aurora eight times, "Apollo seven, Phoebus twelve, and Sol twice." Shields believes that the word "light" is significant to her as it marks her African history, a past that she has left physically behind. He notes that Sun is a homonym for Son, and that Wheatley intended a double reference to Christ. Wheatley also refers to "heav'nly muse" in two of her poems: "To a Clergy Man on the Death of his Lady" and "Isaiah LXIII," signifying her idea of the Christian deity.

Classical allusions are prominent in Wheatley's poetry, which Shields argues set her work apart from that of her contemporaries: "Wheatley's use of classicism distinguishes her work as original and unique and deserves extended treatment." Particularly extended engagement with the Classics can be found in the poem "To Maecenas", where Wheatley uses references to Maecenas to depict the relationship between her and her own patrons, as well as making reference to Achilles and Patroclus, Homer and Virgil. At the same time, Wheatley indicates to the complexity of her relationship with Classical texts by pointing to the sole example of Terence as an ancestor for her works: The happier Terence all the choir inspir'd, His soul replenish'd, and his bosom fir'd; But say, ye Muses, why this partial grace, To one alone of Afric's sable race; While some scholars have argued that Wheatley's allusions to classical material are based on the reading of other neoclassical poetry (such as the works of Alexander Pope), Emily Greenwood has demonstrated that Wheatley's work demonstrates persistent linguistic engagement with Latin texts, suggesting good familiarity with the ancient works themselves. Both Shields and Greenwood have argued that Wheatley's use of classical imagery and ideas was designed to deliver "subversive" messages to her educated, majority white audience, and argue for the freedom of Wheatley herself and other enslaved people.

Scholarly critique
Black literary scholars from the 1960s to the present in critiquing Wheatley's writing have noted the absence in it of her sense of identity as a black enslaved person. A number of black literary scholars have viewed her work—and its widespread admiration—as a barrier to the development of black people during her time and as a prime example of Uncle Tom syndrome, believing that Wheatley's lack of awareness of her condition of enslavement furthers this syndrome among descendants of Africans in the Americas.

Some scholars thought Wheatley's perspective came from her upbringing. Writing in 1974, Eleanor Smith argued that the Wheatley family took interest in her at a young age because of her timid and submissive nature. Using this to their advantage, the Wheatley family was able to mold and shape her into a person of their liking. The family separated her from other slaves in the home and she was prevented from doing anything other than very light housework. This shaping prevented Phillis from ever becoming a threat to the Wheatley family or other people from the white community. As a result, Phillis was allowed to attend white social events and this created a misconception of the relationship between black and white people for her.

The matter of Wheatley's biography, "a white woman's memoir", has been a subject of investigation. In 2020, American poet Honorée Fanonne Jeffers published her The Age of Phillis, based on the understanding that Margaretta Matilda Odell's account of Wheatley's life portrayed Wheatley inaccurately, and as a character in a sentimental novel; the poems by Jeffers attempt to fill in the gaps and recreate a more realistic portrait of Wheatley.

Legacy and honors
With the 1773 publication of Wheatley's book Poems on Various Subjects, she "became the most famous African on the face of the earth." Voltaire stated in a letter to a friend that Wheatley had proved that black people could write poetry. John Paul Jones asked a fellow officer to deliver some of his personal writings to "Phillis the African favorite of the Nine (muses) and Apollo." She was honored by many of America's founding fathers, including George Washington, who wrote to her (after she wrote a poem in his honor) that "the style and manner [of your poetry] exhibit a striking proof of your great poetical Talents."

Critics consider her work fundamental to the genre of African-American literature, and she is honored as the first African-American woman to publish a book of poetry and the first to make a living from her writing.

 * In 2002, the scholar Molefi Kete Asante listed Phillis Wheatley as one of his 100 Greatest African Americans.
 * Wheatley is featured, along with Abigail Adams and Lucy Stone, in the Boston Women's Memorial, a 2003 sculpture on Commonwealth Avenue in Boston, Massachusetts.
 * In 2012, Robert Morris University named the new building for their School of Communications and Information Sciences after Phillis Wheatley.
 * Wheatley Hall at UMass Boston is named for Phillis Wheatley.

In 1892 a Phyllis Wheatley Circle was formed in Greenville, Mississippi. and in 1896 the Phyllis Wheatley Circle.

She is commemorated on the Boston Women's Heritage Trail. The Phyllis Wheatley YWCA in Washington, D.C., and the Phillis Wheatley High School in Houston, Texas, are named for her, as are the Phyllis Wheatley School in Apopka, Florida, and the historic Phillis Wheatley School in Jensen Beach, Florida, now the oldest building on the campus of American Legion Post 126 (Jensen Beach, Florida). A branch of the Richland County Library in Columbia, South Carolina, which offered the first library services to black citizens, is named for her. A branch of the Rochester Public Library system in Rochester, New York was named for her when it was built in 1971. Phillis Wheatley Elementary School, New Orleans, opened in 1954 in Tremé, one of the oldest African-American neighborhoods in the US. The Phillis Wheatley Community Center opened in 1920 in Greenville, South Carolina, and in 1924 (spelled "Phyllis") in Minneapolis, Minnesota.

On July 16, 2019, at the London site where A. Bell Booksellers published Wheatley's first book in September 1773 (8 Aldgate, now the location of the Dorsett City Hotel), the unveiling took place of a commemorative blue plaque honoring her, organized by the Nubian Jak Community Trust and Black History Walks.

Wheatley is the subject of a project and play by British-Nigerian writer Ade Solanke entitled Phillis in London, which was showcased at the Greenwich Book Festival in June 2018. A 90-minute play by Solanke titled Phillis in Boston was presented at the Old South Meeting House in November 2023.

A 30-item collection of material related to Wheatley, including publications from her lifetime containing poems by her, was acquired by the Smithsonian's National Museum of African American History and Culture in 2023.

title: Phillis Wheatley