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The length of a year (orbit) for Mercury is 88 Earth days, about 1/4 that of Earth.

The planet spins 1.5 times during that period, about once every 58.7 Earth days. The combination of these motions results in a "solar day" (sunrise to sunrise) of 176 Earth days, or exactly twice as long as the year. So you could say that a Mercury year is only half of a Mercury solar day.

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13y ago

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