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  2. Atmosphere of Jupiter - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_Jupiter

    The atmosphere of Jupiter is the largest planetary atmosphere in the Solar System. It is mostly made of molecular hydrogen and helium in roughly solar proportions; other chemical compounds are present only in small amounts and include methane, ammonia, hydrogen sulfide, and water. Although water is thought to reside deep in the atmosphere, its ...

  3. Jupiter - Wikipedia

    en.wikipedia.org/wiki/Jupiter

    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. [95] Jupiter's atmosphere extends to a depth of approximately 3,000 km (2,000 mi) below the cloud layers.

  4. Galilean moons - Wikipedia

    en.wikipedia.org/wiki/Galilean_moons

    Io has an extremely thin atmosphere made up mostly of sulfur dioxide (SO 2). [29] If a surface data or collection vessel were to land on Io in the future, it would have to be extremely tough (similar to the tank-like bodies of the Soviet Venera landers) to survive the radiation and magnetic fields that originate from Jupiter. [30]

  5. Extraterrestrial atmosphere - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_atmosphere

    The atmosphere of Uranus is composed primarily of gas and various ices. It is about 83% hydrogen, 15% helium, 2% methane and traces of acetylene. Like Jupiter and Saturn, Uranus has a banded cloud layer, although this is not readily visible without enhancement of visual images of the planet.

  6. Gas giant - Wikipedia

    en.wikipedia.org/wiki/Gas_giant

    A gas giant is a giant planet composed mainly of hydrogen and helium. [1] Jupiter and Saturn are the gas giants of the Solar System. The term "gas giant" was originally synonymous with "giant planet". However, in the 1990s, it became known that Uranus and Neptune are really a distinct class of giant planets, being composed mainly of heavier ...

  7. Atmosphere - Wikipedia

    en.wikipedia.org/wiki/Atmosphere

    An atmosphere (from Ancient Greek ἀτμός (atmós) 'vapour, steam' and σφαῖρα (sphaîra) 'sphere') [1] is a layer of gasses that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosphere is the ...

  8. Callisto (moon) - Wikipedia

    en.wikipedia.org/wiki/Callisto_(moon)

    It is less affected by Jupiter's magnetosphere than the other inner satellites because of its more remote orbit, located just outside Jupiter's main radiation belt. [19] [20] Callisto is surrounded by an extremely thin atmosphere composed of carbon dioxide [9] and probably molecular oxygen, [10] as well as by a rather intense ionosphere. [21]

  9. Europa (moon) - Wikipedia

    en.wikipedia.org/wiki/Europa_(moon)

    Europa / jʊˈroʊpə / ⓘ, or Jupiter II, is the smallest of the four Galilean moons orbiting Jupiter, and the sixth-closest to the planet of all the 95 known moons of Jupiter. It is also the sixth-largest moon in the Solar System. Europa was discovered independently by Simon Marius and Galileo Galilei [2] and was named (by Marius) after ...