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Mona Evans
Mona Evans • 2 years ago

Europa. It's covered in ice and is one of the smoothest objects in the Solar System. The small number of craters shows that the surface is young, possibly only a 100 million years old. (That's young geologically.) In this picture you can see that there are also cracks and streaks. The cracking is caused by tidal heating, but we don't know exactly what the staining is. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...

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Jupiter and its moon Io. The red dot is a volcano on the moon's surface and the blue cloud is the volcano's emissions

Based on new evidence from Jupiters moon Europa, astronomers hypothesize that chloride salts bubble up from the icy moons global liquid ocean and reach the frozen surface where they are bombarded with sulfur from volcanoes on Jupiters moon Io. credit : NASA/JPL-CalTech