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Which Is The Coldest Planet?

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    Pluto has always had the 'honour' of being the coldest planet with an average temperature between -360 to -400 degrees Fahrenheit.  This is because it is so far away from the sun: it is over 40 times further from the sun than planet Earth.
    Pluto also has no internal heat source and it even orbits in a ring of ice debris.
    However, since September 2006, Pluto has been downgraded.  It is no longer a 'proper' planet ie there used to be 9 planets in the solar system, of which Pluto was one.  Now there are only eight planets and Pluto has been re-classified as a dwarf planet.
    Its nearest neighbour, Neptune is also a considerable distance from the sun about  1.5 billion kms.  But Neptune has an internal heat source which means that it has a temperature similar to Uranus, even though it is further away from the sun.
    1 0

    Hedgehog 

    answered 3 years ago

      Pluto if you still consider it a planet.. Then it is neptune
      0 0

      Pandaparks 

      answered 10 months ago

        Saturn, Jupiter and Uranus
        0 0
        Guest

        Guest 

        answered 7 months ago

        The coldest planet is neptune and uranus
        0 0
        Guest

        Guest 

        answered 6 months ago

        Neptune
        0 0

        Guest 

        answered 1 week ago

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