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Proxima Centauri and tidally locked planets

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Proxima Centauri may have a rocky, earth like planet close to its dim sun. Tidally locked, the sun facing side may have a temperature up to 30 degrees Celsius and a dark side of -30 C. This would make one side temperate with liquid water, and the other frozen like antarctica - cold, but not unbelievably so.

Assuming it holds on to its atmosphere, what sort of weather systems might we find on such a planet, where one side is perpetually day time (with moderate weather) and the other a frozen night?

Taking this further, if I may, would we expect unique adaptations from life originating on such a planet?

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This post was sourced from https://worldbuilding.stackexchange.com/q/53044. It is licensed under CC BY-SA 3.0.

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