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What is a day longer than year?

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Anonymous

12y ago
Updated: 11/12/2022

Venus: Venus has a "sidereal" day (rotation period)that's longer than its "year" (orbital period).

A siderealday on Venus is equal to about243 Earth days, whereas a year is about 224.7 Earth days.

Mercury:
It takes Mercury about58.64 Earth days to spin on its axis - which is one Mercury siderealday. However, the "solar " day on Mercury is about 176 Earth days long.It takes Mercury about87.96 Earth days to orbit the Sun, which is defined as one Mercury year.

So, for Mercury it is thesolar day, not the sidereal day that is longer than its year.

(A solar day on Earth is 24 hours. A sidereal day, which is how long it takes Earth to spin on its axis, is about 4 minutes shorter.A year on Earth is about365.25 days - which is how long it takes Earth to orbit the Sun.)

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Beulah Skiles

Lvl 13
2y ago

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