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Why is mercury so cold in certain spots when its so close to the sun?

April 26, 2017certain cold mercury spots Sun

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Why is mercury so cold in certain spots when its so close to the sun?

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Because Mercury is what’s called a “one-face” planet: It doesn’t rotate around its own axis. So one side of Mercury always faces the Sun, and is hot — and the other side always faces away, and is cold. As there’s no atmostphere to speak of, there’s no convection either.