This page is about a Multopedia article; for the character, see Mercury
Mariner's Mercury

Mercury: This image shows Mercury were taken from Mariner 10.

Mercury is the planet closest to the Sun. A terrestrial planet made of mostly rocks and metals. The smallest planet. Mercury has virtually no atmosphere and is not protected from meteor hits, so the surface is covered with craters.


  • Mercury takes about 88 Earth days to complete one orbit about the Sun.
  • Mercury's surface temperature can reach a scorching 840 degrees Fahrenheit (450 degrees Celsius).
  • Mercury was named by ancient Romans after their messenger god and the god of travelers.

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