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    From: Robert Eno
    Date: 2004 May 12, 20:41 -0400
    This is not exactly a navigation question but given the relationship between navigation and astronomy, I figure it is fair game.
    I was having a discussion with a fellow regarding global warming and the subject of Venus came up. It is common to hear that were it not for Venus' thick atmosphere the planet would not be so hot and in fact some suggest that it would be within a temperature range that would support life. While I  agree with the greenhouse gas theory of Venus, I indicated to my friend that the idea of Venus supporting life is preposterous; for even without the thick atmosphere its proximity to the sun guarantees daytime temperature that would be far too hot for humans.
    I think I may be dead wrong in my assumption. A quick search of the net and some of my astronomy textbooks indicates that in the absence of an atmosphere the surface temperature of Venus would be 230 K, which is equal to minus 43 Celsius.  Somehow, despite the evidence before me, this just doesn't seem right. I would have sworn that the temperature would be much highter than that, even without the thick atmsophere.
    I should know better than to shoot my mouth off on the strength of unproven assumptions.
    Anyone on the list have a definitive answer to this?
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