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A day on Venus outlasts its entire year.

Rocky planets · rotation

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Venus turns once every 243 Earth days but laps the Sun every 225, so one Venusian day is longer than a Venusian year. It also spins the opposite way to nearly every other planet, so from the ground the Sun rises in the west.

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Which planet has the longest day in the solar system?

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Venus. A single rotation takes about 243 Earth days, longer than the 225 days it needs to circle the Sun. Its upper atmosphere is far less patient: high winds lap the whole planet in roughly four days.

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