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Which planet has the longest day relative to its year?
Quick Answer
Venus has the longest day relative to its year, because one rotation takes about 243 Earth days while one orbit takes about 225 Earth days. Its day is longer than its year.
The Full Story
Venus has the most extreme day-to-year ratio among the planets. It takes about 243 Earth days to rotate once on its axis, but only about 225 Earth days to orbit the Sun. That means a Venusian day is slightly longer than a Venusian year. Venus also rotates backward compared with most planets, a feature known as retrograde rotation.
Key Facts
1.Rotation period: about 243 Earth days
2.Orbital period: about 225 Earth days
3.Venus rotates retrograde
YouTube Angle
Suggested video title for this topic:
"On Venus, a day lasts longer than a year."
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