ganymede compared to earth

[87] Its diameter is 4–5 Ganymede radii. A Laplace-like resonance is similar to the current Laplace resonance among the Galilean moons with the only difference being that longitudes of the Io–Europa and Europa–Ganymede conjunctions change with rates whose ratio is a non-unity rational number. They refined its size, revealing it was larger than Saturn's moon Titan, which was previously thought to have been bigger. ), a Greek sculptor of Athens who was engaged with Scopas on the Mausoleum at Halicarnassus cast a lost bronze group of Ganymede and the Eagle, a work that was held remarkable for its ingenious composition. Of the 60 moons it is the 7th closest to Jupiter, with a standoff distance of 670,900 km. Average temperatures for each latitude: 1. poles: 11 C 2. [102] Pioneer 10's closest approach was 446,250 km. To emphasize the non-normative relation, the work includes a long passage, possibly an ekphrasis derived from Italian art, in which Jupiter in the form of an eagle abducts Ganymede. [22][90], Despite the presence of an iron core, Ganymede's magnetosphere remains enigmatic, particularly given that similar bodies lack the feature. However, it has many of the prerequisites we think life needs. [36] Leochares (ca. A similarly colossal ocean of liquid water may exist below its roughly 60-mile-thick crust of ice. Ganymede is much colder than Earth, with these daytime temperatures ranging across the surface from 90 to 160 Kelvin (or -297 to -171 degrees Fahrenheit). Like Earth's Moon, Ganymede keeps the same face towards its central planet, in this case Jupiter. The diameter of Mercury is 2.5 times smaller than that of the Earth. Ganymede is theoretically a more stable home for life, since it will be warmed by tidal heating by Jupiter long after the Earth’s core cools while th… [36] These flybys are denoted G1, G2, G7, G8, G28 and G29. In Greek mythology, Ganymede /ˈɡænɪmiːd/[1] or Ganymedes /ɡænɪˈmiːdiːz/[2] (Ancient Greek: Γανυμήδης Ganymēdēs) is a divine hero whose homeland was Troy. It does not orbit the sun directly, though it … [22] Its existence is connected with the variation of the Jovian magnetic field near Ganymede. The planet has an ocean that contains more water than Earth’s oceans, though at far greater pressures than even the bottom of the Mariana Trench in the Pacific Ocean. Ganymede is the largest moon in the solar system, but it is still much smaller than the Earth. Ganymede size compared to the Moon and Earth. [116] Possible instruments include Medium Resolution Camera, Flux Gate Magnetometer, Visible/NIR Imaging Spectrometer, Laser Altimeter, Low and High Energy Plasma Packages, Ion and Neutral Mass Spectrometer, UV Imaging Spectrometer, Radio and Plasma Wave sensor, Narrow Angle Camera, and a Sub-Surface Radar. Ganymede - The Giant Moon. [118] Another old proposal was called The Grandeur of Ganymede. Jupiter - Jupiter - The Galilean satellites: Galileo proposed that the four Jovian moons he discovered in 1610 be named the Medicean stars, in honour of his patron, Cosimo II de’ Medici, but they soon came to be known as the Galilean satellites in honour of their discoverer. The Ganymedian surface is separated into two parts Lighter and Darker regions on Ganymede [30] Some authors have equated this version of the myth to Cretan pederasty practices, as recorded by Strabo and Ephoros, that involved abduction of a youth by an older lover for a period of two months before the youth was able to re-enter society as a man. [68] The decay of radioactive elements within rocks further heated the core, causing increased differentiation: an inner, iron–iron-sulfide core and a silicate mantle formed. If a comet goes around enough times, it will eventually break up. Together they are referred to as the Galilean moons. [22][36] Galileo transmitted a large number of spectral images and discovered several non-ice compounds on the surface of Ganymede. [43] Two plays by Tirso de Molina, and in particular La purdencia en la mujer, include intriguing references to Ganymede. [47] The image of Ganymede was invariably that of a naive adolescent accompanied by an eagle and the homoerotic aspects of the legend were rarely dealt with. Our job is to get the settlers to Ganymede from Earth… The planet is too dim to have been seen by ancient civilizations. Abstract. [38] Zeus pursues Ganymede on one side, while on the other side the youth runs away, rolling along a hoop while holding aloft a crowing cock. [100] Today, Ganymede continues to cool slowly. [96][97][98][99] In the latter case, modeling suggests that differentiation would become a runaway process at Ganymede but not Callisto. [4] According to Plato, the Cretans were regularly accused of inventing the myth because they wanted to justify their "unnatural pleasures". The main difference is the speed of plasma flow—supersonic in the case of Earth and subsonic in the case of Ganymede. She plays on her ambiguous charm to seduce Orlando, but also (involuntarily) the shepherdess Phoebe. Although it is smaller than some of the natural bodies in the solar system like Titan and Ganymede, Mercury is way more extensive. It has energy in the form of a molten interior. [88] The main ion species in the magnetosphere is single ionized oxygen—O+[23]—which fits well with Ganymede's tenuous oxygen atmosphere. For comparison with Earth, Miami, Florida lies at 26 degrees north latitude, and Berlin, Germany is located at 52 degrees north. [39] Such Hellenistic gravity-defying feats were influential in the sculpture of the Baroque. Earth and Mars are the only to planets in the solar system with polar ice caps. Royal Collection, Windsor Castle, The Abduction of Ganymede (1635) by Rembrandt, The Induction of Ganymede in Olympus (1768) by van Loo. We would like to show you a description here but the site won’t allow us. Ganymede is the largest satellite in the solar system, … In February 2009 it was announced that ESA and NASA had given this mission priority ahead of the Titan Saturn System Mission. In Greek mythology, Ganymede / ˈ ɡ æ n ɪ m iː d / or Ganymedes / ɡ æ n ɪ ˈ m iː d iː z / (Ancient Greek: Γανυμήδης Ganymēdēs) is a divine hero whose homeland was Troy. Ganymede also appears in the opening of Christopher Marlowe play Dido, Queene of Carthage, where his and Zeus's affectionate banter is interrupted by an angry Aphrodite (Venus). Ganymede is not only in a much quieter space zone, but like Earth it does have a magnetic field, which deflects the continual barrage of ionized particles from Jupiter's magnetic field as it blasts at the trailing hemisphere. [22][23] Edmund Veckenstedt associated Ganymede with the genesis of the intoxicating drink mead, which had a traditional origin in Phrygia. As a comet gets close to the Sun, it loses some of its mass due to the sublimation. [22] During a G1 flyby in 1996, the Ganymedian magnetic field was discovered,[106] while the discovery of the ocean was announced in 2001. [93] This relatively fast formation prevented the escape of accretional heat, which may have led to ice melt and differentiation: the separation of the rocks and ice. [12] Depending on the author, he was the brother of Ilus, Assaracus, Cleopatra and Cleomestra. [56] Another explanation is a remnant magnetization of silicate rocks in the mantle, which is possible if the satellite had a more significant dynamo-generated field in the past. In this particular play, a Jewish doctor who seeks to poison the future king, carries a cup which is compared to Ganymede's.[44]. Cocks were common gifts from older male suitors to younger men they were interested in romantically in 5th century Athens. So I would assume that Ganymede's day/night cycle is sun based, possibly complicated by passing through Jupiter's shadow. [5], Ganymede was the son of Tros of Dardania,[6][7][8] from whose name "Troy" was supposedly derived, either by his wife Callirrhoe, daughter of the river god Scamander,[9][10][11] or Acallaris, daughter of Eumedes. Several probes flying by or orbiting Jupiter have explored Ganymede more closely, including four flybys in the 1970s, and multiple passes in the 1990s to 2000s. Adapting an 1892 lithograph by. In fact, Jupiter’s polar flattening is greater than that of Earth’s – 0.06487 ± 0.00015 compared to 0.00335. [36] It is apparently copied in a well-known marble group in the Vatican. The intrinsic field strength at the poles is two times that at the equator—1440 nT. [109], The Europa Jupiter System Mission (EJSM) had a proposed launch date in 2020, and was a joint NASA and ESA proposal for exploration of many of Jupiter's moons including Ganymede. Thank you 15 deg: 16 C 7. equator: 17 C Day - night c… This gives the moon auroras similar to the ones on Earth. About half of the surface is old and cratered while the rest consists of much younger, lighter regions. Titan also happens to have an orbital period of 16 days (compared with Earth's 365) so humans would have some adjusting to do when it comes to the workday. Michelangelo's Ganymede. The dipole magnetic field created by this permanent moment has a strength of 719 ± 2 nT at Ganymede's equator,[22] which should be compared with the Jovian magnetic field at the distance of Ganymede—about 120 nT. Ganymede's mantle is most likely composed of ice and silicates, and its crust is probably a thick layer of water ice. [34], In 5th century Athens, the story of Ganymede became popular among vase-painters, which was suited to the all-male symposium. Mercury is twenty times less massive than planet Earth. [22], Given that Ganymede is completely differentiated and has a metallic core,[8][75] its intrinsic magnetic field is probably generated in a similar fashion to the Earth's: as a result of conducting material moving in the interior. The Latin form of the name was Catamitus (and also "Ganymedes"), from which the English word catamite is derived. Earth's Moon vs. Ganymede - This animation puts Earth's moon next to Jupiters moon Ganymede, the largest in the solar system. Encyclopædia Britannica. This means at the equator, Jupiter is moving at 22,000 mph, compared with 1,000 mph for the Earth. Compared to Earth's polar caps, Ganymede's polar terrain is relatively vast. Compared to other ice-covered moons, Ganymede’s surface is thought to be relatively thin and therefore should be easier to penetrate. The Earth seen from Apollo 17.jpg FullMoon2010.jpg Ganymede, moon of Jupiter, NASA.jpg: Author: Apollo 17 Picture of the Whole Earth: NASA. Ganymede is the largest moon in the solar system, and is larger than the planet Mercury. – Ganymede should be a planet, but isn’t. For one, as Jupiter’s largest moon, Ganymede has a gravitational force of 1.428 m/s 2 (the equivalent of 0.146 g) which is comparable to Earth’s Moon. [26] The largest moon of the planet Jupiter (named after Zeus's Roman counterpart) was named Ganymede by the German astronomer Simon Marius.[27]. [88][89] The plasma co-rotating with Jupiter impinges on the trailing side of the Ganymedian magnetosphere much like the solar wind impinges on the Earth's magnetosphere. [92] The accretion of Ganymede probably took about 10,000 years,[93] much shorter than the 100,000 years estimated for Callisto. And only then, only after I had felt that first rush of improbable carnal lust, did it occur to me that this angel was a man.[51]. Xenophon's Socrates points out that Zeus did not grant any of his lovers immortality, but that he did grant immortality to Ganymede.[31]. Ganymede has a diameter of about 5,270 km (3,275 miles), which makes it larger than the planet Mercury. If Earth (or another planet) happens to move through that stream, those particles fall to Earth as meteor showers. Size of Saturn compared to the Earth Side by side comparison of the size of Saturn vs Earth Facts about Saturn. There might be some ice on Ganymede, but it could be hard to find. [36] Ganymede was usually depicted as a muscular young man, although Greek and Roman sculpture typically depicted his physique as less developed than athletes.[37]. Copy after a lost original (1532) pencil. Ganymede is also the only moon in the solar system to have its own magnetic field. But when Rembrandt painted the Rape of Ganymede for a Dutch Calvinist patron in 1635, a dark eagle carries aloft a plump cherubic baby (Paintings Gallery, Dresden) who is bawling and urinating in fright. In Antonio Allegri Correggio's Ganymede Abducted by the Eagle (Vienna) Ganymede's grasp is more intimate. Also, calculations show that the light reflected by Jupiter pales compared to that of the sun. One explanation is that the same orbital resonances proposed to have disrupted the surface also allowed the magnetic field to persist: with Ganymede's eccentricity pumped and tidal heating of the mantle increased during such resonances, reducing heat flow from the core, leaving it fluid and convective. [117] However, the mission was canceled in 2005 because of budget cuts. See what this does to Jupiter's weather below. [104] The grooved terrain was also seen. [94] This hypothesis explains why the two Jovian moons look so dissimilar, despite their similar mass and composition. The leading hemisphere is the hemisphere facing the direction of orbital motion; the trailing hemisphere faces the reverse direction. Jupiter’s Galilean moons size comparison (Io, Europa, Ganymede and Callisto) Facts about Ganymede. [66] By comparison, the radioactive heating of undifferentiated Callisto caused convection in its icy interior, which effectively cooled it and prevented large-scale melting of ice and rapid differentiation. Compared to Earth's polar caps, Ganymede's polar terrain is relatively vast. Mars is a little more than half the size of the Earth, having a diameter of 6,790 kilometers. It rotates at about the same speed as the Earth, taking 24.6 hours. Ganymede has no known atmosphere, but recently the Hubble Space Telescope detected ozone at its surface. 350 B.C.E. Jenny Cheng and Skye Gould/Business Insider. Homer describes Ganymede as the most beautiful of mortals, and in one version of the myth, Zeus falls in love with his beauty and abducts him in the form of an eagle to serve as cup-bearer in Olympus. It roughly takes seven Earth days to Ganymede to complete its one orbit around Jupiter. Saturn is the sixth planet from the Sun, and last of the planets known to ancient civilizations.It was known to the Babylonians and Far Eastern observer. The myth was a model for the Greek social custom of paiderastía, the romantic relationship between an adult male and an adolescent male. Examples of Ganymede in 18th century France have been studied by Michael Preston Worley. [19], Ganymede was abducted by Zeus from Mount Ida near Troy in Phrygia. Eros (designation 433 Eros) is a large, S-type, near-Earth asteroid approximately 34.4×11.2×11.2 kilometers (21.4×7.0×7.0 mi) in size.It is the second-largest near-Earth asteroid. Rubens' version portrays a young man. The Jovian subnebula may have been relatively "gas-starved" when the Galilean satellites formed; this would have allowed for the lengthy accretion times required for Callisto. – Radiation dose in Ganymede’s orbit: risks considerably lower, than near Europa – Radiation dose during gravity assists in Jupiter’s system: comparable, or several times higher, than during 2 months in Ganymede’s orbit. Ganymede is a reluctant son in W.H.Auden's poem of that name, but he adores the eagle which teaches him how to kill. [46] In contrast, Johann Wilhelm Baur portrays a full-grown Ganymede confidently riding the eagle towards Olympus in Ganymede Triumphant (ca. Homer describes Ganymede as the most beautiful of mortals, and in one version of the myth, Zeus falls in love with his beauty and abducts him in the form of an eagle to serve as cup-bearer in Olympus. [88] In these areas, the energetic (tens and hundreds of kiloelectronvolt) electrons and ions have been detected,[81] which may cause the auroras observed around the Ganymedian poles. The angel was beautiful, with a face dominated by immense, lustrous green eyes and framed by golden ringlets, and with a bow mouth and full lips and brilliant white teeth. It was designed to use nuclear fission for power, ion engine propulsion, and would have studied Ganymede in greater detail than previously. He is not always portrayed as acquiescent, however, as in the Argonautica of Apollonius of Rhodes, Ganymede is furious at the god Eros for having cheated him at the game of chance played with knucklebones, and Aphrodite scolds her son for "cheating a beginner. 1640s). The size of Mercury is closer to the size of the Moon than Earth. In analogy to earth, we should expect a 30-hour Ganymede-day. [40], In Shakespeare's As You Like It (1599), a comedy of mistaken identity in the magical setting of the Forest of Arden, Celia, dressed as a shepherdess, becomes "Aliena" (Latin "stranger", Ganymede's sister) and Rosalind, because she is "more than common tall", dresses up as a boy, Ganymede, a well-known image to the audience. Jupiter has both regular moons and irregular moons with further sub-divisions. 45 deg: 15 C 5. We do not know if Ganymede holds life under its thick icy exterior. (1911). [98][99], After formation, Ganymede's core largely retained the heat accumulated during accretion and differentiation, only slowly releasing it to the ice mantle. [8] Some research has suggested that, given its relatively small size, the core ought to have sufficiently cooled to the point where fluid motions, hence a magnetic field would not be sustained. Ganymede and Callisto are planet-sized moons of Jupiter, with surfaces composed of a mixture of dark dust and bright ice. [79] In addition, heavy ions precipitate continuously on Ganymede's polar surface, sputtering and darkening the ice. The induced moment is directed radially to or from Jupiter following the direction of the varying part of the planetary magnetic field. But because Ganymede has … By way of comparison Io receives 3600 rems/day, Europa 540 rems/day and Ganymede a more modest 8 rems/day at its magnetosphere “shielded” equator . [107][108], On December 25, 2019, the Juno spacecraft flew by Ganymede during its 24th orbit of Jupiter, and got images of the moon's polar regions. The Ganymede magnetosphere shown in Fig. [45] Painter-architect Baldassare Peruzzi included a panel of The Rape of Ganymede in a ceiling at the Villa Farnesina, Rome, (ca 1509–1514), Ganymede's long blond hair and girlish pose make him identifiable at first glance, though he grasps the eagle's wing without resistance. 1531), which shows the youth riding the eagle as opposed to being carried away, however, this composition is likely not typical, as an earlier composition by Michelangelo that survives only as sketches depicts Ganymede being carried. In the polar cap regions, at latitudes higher than 30°, magnetic field lines are open, connecting Ganymede with Jupiter's ionosphere. [91], Ganymede probably formed by an accretion in Jupiter's subnebula, a disk of gas and dust surrounding Jupiter after its formation. Material streams from comets and populates the comet’s orbit. But Ganymede is in tidal lock, always showing its same side to Jupiter. Telescopic Image of the Full Moon: Gregory H. Revera Computer-enhanced image of Ganymede: NASA/JPL/DLR In poetry, Ganymede became a symbol for the beautiful young male who attracted homosexual desire and love. Because of the subsonic flow, there is no bow shock off the trailing hemisphere of Ganymede. Saturn’s were the first rings seen through telescopes from Earth. [68][94] Alternative theories explain Ganymede's greater internal heating on the basis of tidal flexing[95] or more intense pummeling by impactors during the Late Heavy Bombardment. Cambridge University Press. m3,[22] which is three times larger than the magnetic moment of Mercury. 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Heinlein" (part 1), https://en.wikipedia.org/w/index.php?title=Ganymede_(moon)&oldid=1001883087, Short description is different from Wikidata, Articles with Encyclopædia Britannica links, Wikipedia articles with WorldCat-VIAF identifiers, Creative Commons Attribution-ShareAlike License, This page was last edited on 21 January 2021, at 20:50. For comparison with Earth, Miami, Florida lies at 26 degrees north latitude, and …

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