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A year is defined as the time it takes for a planet to orbit the sun. This amount of time varies from planet to planet.
In our solar system Venus and Mercury have shorter years than the earth, (ie they orbit the sun in less time than the earth) all the other planets have longer years than us.
A year on Mars is about twice as long as a year on earth, on Neptune the year is about 165 of our years.

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10y ago

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