Jupiter's Moon Ganymede

Jupiter's moon Ganymede is the largest satellite in the solar system. Larger than Mercury and Pluto, and only slightly smaller than Mars, it would easily be classified as a planet if were orbiting the sun rather than Jupiter.

The moon likely has a salty ocean underneath its icy surface, making it a potential location for life. The European Space Agency plans a mission to Jupiter's icy moons that in 2030, is planned to arrive and put special emphasis on observing Ganymede.

Know more:http://www.space.com/16440-ganymede-facts-about-jupiters-largest-moon.html

Reference:http://www.space.com/28807-jupiter-moon-ganymede-salty-ocean.html

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