Mercury is the closest planet to the Sun, and the second-smallest planet in the solar system! It is about the same size as our Moon and their cratered surfaces actually have much in common. Mercury travels around the Sun faster than any other planet. It can only be seen from Earth just before sunrise or just after sunset. But of course you can always download Planet Mercury 3D screensaver that will get you acquainted with this mysterious planet!
This great 3D screensaver will get you acquainted with the mysterious planet. 
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