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THE HOTTEST PLANET IN OUR SOLAR SYSTEM IS 450° C. Venus is th | Astronomy Knowledge

THE HOTTEST PLANET IN OUR SOLAR SYSTEM IS 450° C.

Venus is the hottest planet in the solar system and has an average surface temperature of around 450° C. Did you know that Venus isn't the closest planet to the sun?  That is Mercury.  You would think that Mercury would then be the hottest, but Mercury has no atmosphere (which regulates temperature), resulting in big fluctuations. 

@Astronomic