Mercury

Two spacecraft have landed on Mercury so far, Marnier 10  and MESSENGER. In many ways Mercury is similar to the moon: for example, both surfaces are heavily cratered and old. Mercury is the eighth largest planet. Mercury is the closest planet to the Sun. Mercury's core consists of iron. Mercury has the greatest variation of temperatures in our solar system from 90 K to 700 K. Mercury has a very thin atmosphere. "Ideas are like stars, we can't physically touch them, but, like the marines of the sea we chart our course by them" - Carl Schurz





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