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Planetary Science

What planet has the lowest surface temperature?


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2013-05-15 18:59:16
2013-05-15 18:59:16

The Pluto with a surface temperature of -235 degree C.But as now a days Pluto being not considered as an authentic planet in our solar system other than a mere KBO (kuiper belt object).The coldest planet status should go to Neptune (-213 degree C) & Uranus (-210 degree C).
Neptune maybe. It is farthest from the Sun.

Actually, perhaps surprisingly, some sources say Uranus is slightly colder than Neptune.

Neptune seems to have an internal heat source.

If you wanted to include "Dwarf Planets", then Pluto or Eris, which is even FARTHER out. We don't really have good temperature information on the trans-Neptunian dwarf planets.

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Technically speaking, Neptune is the planet with the lowest surface temperature; however, Neptune does not have a solid surface.

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Uranus or Neptune. They have almost the same average surface temperature.

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Black dwarfs have the lowest surface temperature.

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In our solar system, the planet with the lowest air temperature is Uranus, with a minimum temperature of about 49 K and a mean surface temperature at 1 bar of about 76 K.


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