"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.

Jupiter's four largest moons - the Galilean moons. (Jupiter has 66 moons all together)

The four largest and best known of Jupiter's 60+ moons. I can see these through my telescope!!! ❤️

Jupiter's Galilean moons - Europa, Io, Callisto, and Ganymede - are visible with binoculars. First spotted by Galileo in

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

Callisto - Fourth moon of Jupiter after Io - Europa - Ganymede. Formed of rock and ices Third largest moon in our solar system after Titan (Saturn) and Ganymede (Jupiter) respectively. Jupiter's Io being fourth and our Luna fifth.

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 largest moon in the solar system. It is more heavily cratered than any

Jupiter Moon Io, Jupiter Moon Picture, Io Picture -- National Geographic

This "family portrait" is a composite of the Jovian system: the edge of Jupiter with its Great Red Spot + Jupiter's 4 largest moons, known as the Galilean satellites. The moons (top-to-bottom): Io, Europa, Ganymede and Callisto.

#Jupiter Moon Io's many erupting #Volcanoes Revealed in New Map - -http://www.space.com/16108-jupiter-moon-io-volcano-map.html?PT_space

Io’s Surface: Under Construction Credit: Galileo Project, JPL, NASA Explanation: Like the downtown area of your favorite city, the roads you drive to work on, and any self-respecting web site … Io’s.

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.

“Tiger Stripes” of Enceladus “ Pictured here is a high resolution Cassini image of Enceladus from a close flyby. Image credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Do underground oceans vent.

Oct 2010 Io in True Color Credit: Galileo Project, JPL, NASA  The strangest moon in the Solar System is bright yellow. Io's colors derive from sulfur and molten silicate rock. The unusual surface of Io is kept very young by its system of active volcanoes. The intense tidal gravity of Jupiter stretches Io and damps wobbles caused by Jupiter's other Galilean moons. The resulting friction greatly heats Io's interior, causing molten rock to explode through the surface.

Oct 2010 Io in True Color Credit: Galileo Project, JPL, NASA The strangest moon in the Solar System is bright yellow. Io's colors derive from sulfur and molten silicate rock. The unusual surface of Io is kept very young by its system of active volcanoes.

Callisto is a moon of the planet Jupiter. It was discovered in 1610 by Galileo Galilei. It is the third-largest moon in the Solar System and the second largest in the Jovian system, after Ganymede. Callisto has about 99% the diameter of the planet Mercury but only about a third of its mass. It is the fourth Galilean moon of Jupiter by distance, with an orbital radius of about 1,880,000 km.

Callisto (Jupiter IV) is a moon of the planet Jupiter. It was discovered in 1610 by Galileo Galilei. It is the third-largest moon in the Solar System and the second largest in the Jovian system, after Ganymede.

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