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How can a day be longer than a year?

Updated: 4/28/2022
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11y ago

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Venus takes 224.7 Earth days to revolve about the Sun and 243.02 Earth days to rotate about its axis (which it does clockwise, opposite to most of the other planets). This rotation period is a "sidereal day", the time to revolve around the Sun is a Venus "year".

Mercury takes 88 Earth days to go around the Sun, so its year is 88 Earth days. It spins slowly, taking 58.6 Earth days. A "solar day" on Mercury takes 176 Earth days because of this slow spin relative to the time taken to orbit.

So Venus has a sidereal day longer than its year and Mercury has a solar day

longer than its year.

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What planets days are longer than your year?

Venus "sidereal day" is longer than its year. Mercury's "solar day" is longer than its year. However, there is no planet in our solar system with a day longer than our year on Earth.


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Yes. In fact, Venus has a longer day than its year.


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On the planet Venus - it takes longer for Venus to make one rotation than it does for it to go around the sun once, so Venus' day is LONGER than it's year. Imagine that?


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Yes - a prime example is the planet Venus... Its 'day' is 243 Earth days, and it's 'year' is 225 Earth days, meaning a day on Venus is longer than it's year !


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All planet's years are longer than their days except for Venus.You probably meant to ask which planet's day is longer than its year, and the answer is Venus.


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