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Fun facts about Mercury include the fact that although it is the planet closest to the sun, it is not actually the hottest (Venus is)! The small planet was named after the Roman messenger of the gods. Spacecraft have managed to map some of the planet, but because of its position in the solar system, this can be extremely problematic.

5 Facts About Mercury

Mercury is one of the most mysterious planets in our solar system. So check out these 5 facts. Short video.

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