Mercury is the smallest planet in our Solar System. And it's the fastest planet! Learn how Mercury is like Earth's Moon. Then discover the history of exploring Mercury, what we have found on the planet's surface, and other fun facts!
Mercury is the smallest planet in our Solar System. And it's the fastest planet! Learn how Mercury is like Earth's Moon. Then discover the history of exploring Mercury, what we have found on the planet's surface, and other fun facts!
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