• Question: If there was no sun what would the temperature be?

    Asked by kamilo12 to David, Mus, Tess, Yue on 15 May 2012.
    • Photo: Tess Newman

      Tess Newman answered on 15 May 2012:

      If we are assuming that somehow the earth has survived and is still in it’s current location, we can assume that the only solar heat reaching us would be from distant stars. It seems that none of these are close enough to heat the Earth, so the temperature would be close to that of deep space, or about -273.15 C. There may also be some heat from other sources, such as the planets, the core of the Earth, and our atmosphere providing insulation…

      I have simplified the above answer from a very clever man – http://www.quora.com/Astronomy/If-there-were-no-sun-approximately-what-temperature-would-the-Earth-be