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Explore Spacecraft Galileo, Nasa S Galileo, and more!

Io. The most volcanically active body in the Solar System, it's about the same size as the Moon and orbits at about the same distance from Jupiter as the Moon does from Earth. Yet it has over 400 volcanoes and a “month” on Io lasts only 42 hours. This is all down to gravity. Caught between Jupiter's strong gravity and that of its companions Callisto & Ganymede, Io is mercilessly squeezed, releasing heat. ©Mona Evans,"Jupiter's Galilean Moons" http://www.bellaonline.com/articles/art42279.asp

Jupiter and its moons Europa, Ganymede, Callisto, and the Earth’s moon all caught in the same photo.

National Geographicfrom National Geographic

Jupiter Moon Io, Jupiter Moon Picture, Io Picture

Jupiter and Its Moons Photograph courtesy NASA This family portrait, a composite of the Jovian system, includes the edge of Jupiter (with the Great Red Spot visible) and Jupiter's four largest moons, known as the Galilean satellites. From top to bottom are Io, Europa, Ganymede, and Callisto. The smallest of these four moons, Europa is about the size of Earth's moon.

BuzzFeedfrom BuzzFeed

See How Much You Weigh On Jupiter, Mars, And The Moon

Your Weight in Outer Space. On Earth, On Jupiter, On Mars, On Moon.

TheMetaPicture.comfrom TheMetaPicture.com

If the planets were as far away from earth as the moon…

If the planets were as far away from earth as the moon… (think that I would be scared by Jupiter & Saturn! lol)

TheMetaPicture.comfrom TheMetaPicture.com

If the planets were as far away from earth as the moon…

If the planets were as far away from earth as the moon… More