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Question on Mercury

  1. Oct 23, 2007 #1
    Still being so close to the sun, what prevents the planet Mercury from vaporizing away?
  2. jcsd
  3. Oct 23, 2007 #2


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    Science Advisor
    Gold Member

    Because it is made of rock and iron, mainly iron, and though close it is still not hot enough to melt, let alone vapourise.

  4. Oct 23, 2007 #3


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    Staff: Mentor

    To put it another way, Mercury doesn't vaporize for the same reason the Earth doesn't vaporize - it isn't close enough to the sun to get that hot.
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