The year is longest on : _____________?
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Answer: B. Venus
Explanation
Venus has a very slow retrograde rotation, resulting in a solar day longer than its orbital year. The unusual rotation speed of Venus makes its surface day last longer than its trip around the Sun. Astronomical measurements confirm that Venus rotates on its axis slower than it revolves. Planetary rotation measures the time taken to spin once on its internal rotational axis. A solar year measures the duration of one complete revolution in orbit around the Sun. Venus rotates in the opposite direction of most planets in our solar system.
Space science education often highlights Venus as having the most unusual day-night cycle. Atmospheric studies on Venus investigate how slow rotation impacts weather and wind patterns. Planetary astronomers study rotational dynamics to understand celestial formation histories. Mercury has a fast orbital year relative to its rotation, making its year shorter than its solar day. Mars has a solar day very similar to Earth alongside a standard multi-month orbital year. The Earth has a standard twenty-four-hour day and a three-hundred-sixty-five-day orbital year.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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