How does Mercury’s rotation relate to the Sun?. Physics & Astronomy

It always keeps one face tidally locked toward the Sun, as our Moon does with us
Its day is the same length as its years
Its year is much shorter, only 88 days, than its slow rotation of 243 days on its axis
Its rotation rate is ⅔ as long as its year, due to tidal resonances
It does not spin at all, being tidal stopped by the solar tides

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