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Penguigo t1_jba2jpg wrote

Reply to comment by mattttb in TIL the largest moon in our solar system, Ganymede, is larger than the planet of Mercury by Jugales

Correct me if I'm wrong, but isn't Mercury tidally locked, and therefore none of the planet experiences both day and night?

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Gamenern t1_jba4zlq wrote

Mercury isn't tidally locked to the sun, but rather in a 3:2 spin-orbit resonance. It actually has a 'day' that is the same length as 2 'years'.

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