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Jupiter Moons - Callisto discovered by Galileo Galilei in 1610 using a telescope. It is thought to have oceans of liquid water beneath its crust. about the size of Mercury, is the 3rd largest moon in the solar system. It is more heavily cratered than any other moon in the solar system. Callisto remains as it was when it formed, during the period of intense meteoroid bombardment that the entire solar system experienced

Jupiter Moons - Callisto discovered by Galileo Galilei in 1610 using a telescope. It is thought to have oceans of liquid water beneath its crust. about the size of Mercury, is the 3rd largest moon in the solar system. It is more heavily cratered than any other moon in the solar system. Callisto remains as it was when it formed, during the period of intense meteoroid bombardment that the entire solar system experienced

"i want to know how. why. i want to discover the secrets of the universe and i want to *believe*."

An entry from I never will speak word.

"i want to know how. why. i want to discover the secrets of the universe and i want to *believe*."

callisto. one of jupiter's moons and one of my very favorite things in space. - Bing Images

callisto. one of jupiter's moons and one of my very favorite things in space. - Bing Images

Enceladus, one of Saturn's moons.  The Cassini spacecraft captured an image of plumes originating from the south pole of the icy moon with a very clear signature of small ice particles. There is possible evidence of Yellowstone-like geysers fed by reservoirs of liquid water.

Enceladus, one of Saturn's moons. The Cassini spacecraft captured an image of plumes originating from the south pole of the icy moon with a very clear signature of small ice particles. There is possible evidence of Yellowstone-like geysers fed by reservoirs of liquid water.

Io: Moon Over Jupiter   Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA

Io: Moon Over Jupiter Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA

NASA’s Juno Spacecraft will arrive at Jupiter in the next few day after nearly five years in space. While it’s purpose is primarily to study Jupiter’s origins, interior structure, deep atmosphere and magnetosphere, it’s worth remembering Jupiter is also host to the largest and some of the most interesting moons in the solar system. Lets …

NASA’s Juno Spacecraft will arrive at Jupiter in the next few day after nearly five years in space. While it’s purpose is primarily to study Jupiter’s origins, interior structure, deep atmosphere and magnetosphere, it’s worth remembering Jupiter is also host to the largest and some of the most interesting moons in the solar system. Lets …

Jupiter has 64 moons, and from top to bottom, the moons shown are Io, Europa, Ganymede and Callisto.

Jupiter has 64 moons, and from top to bottom, the moons shown are Io, Europa, Ganymede and Callisto.

Jupiter and moons - great Hubble image. Makes me think of the Ulubis system in Iain M Banks' The Algebraist.

Jupiter and moons - great Hubble image. Makes me think of the Ulubis system in Iain M Banks' The Algebraist.

Jupiter - I just learned that when NASA sent a space probe to Jupiter back in 1995, it took 14 years to get there and once it finally entered Jupiter's atmosphere and started dropping down towards the core, the pressure was so intense that after 58 minutes of descending, the space probe was CRUSHED! How cool is that?! (Thank you Netflix for having dorky shows for me to watch) :)

Jupiter - I just learned that when NASA sent a space probe to Jupiter back in 1995, it took 14 years to get there and once it finally entered Jupiter's atmosphere and started dropping down towards the core, the pressure was so intense that after 58 minutes of descending, the space probe was CRUSHED! How cool is that?! (Thank you Netflix for having dorky shows for me to watch) :)

Ganymede...  Jupiter's largest moon, and for that matter, it is the largest moon in the Solar System.  It is slightly larger than the planet, Mercury.  Ganymede orbits Jupiter about once every week.

Ganymede... Jupiter's largest moon, and for that matter, it is the largest moon in the Solar System. It is slightly larger than the planet, Mercury. Ganymede orbits Jupiter about once every week.

Jupiter's Moon Ganymede Has a Salty Ocean with More Water Than Earth The ocean there is thought to extend to 10 times the depth of Earth's oceans

Jupiter's Moon Ganymede Has a Salty Ocean with More Water Than Earth The ocean there is thought to extend to 10 times the depth of Earth's oceans

Io in True Color: Jupiter's moon Io is intensely yellow is from sulfur and molten silicate rock. Its pocked surface is due to young, active volcanoes.

Io in True Color: Jupiter's moon Io is intensely yellow is from sulfur and molten silicate rock. Its pocked surface is due to young, active volcanoes.