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A year here on planet Earth is 365 and a quarter days long.

A "relative length of year" can only be given by comparison with some other object's year. Since we live on the Earth, we usually compare the years of other planets to that of Earth, rather than the other way around.

So the year of Mars is 1.88 Earth years and that of Venus is 0.615 Earth years.

The year of Earth is 1.000 Earth years.

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12y ago

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