Which two months mark the occurrence of equinoxes?

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Explore the intricacies of the Sun-Earth-Moon System with our C20 Test. Utilize flashcards and multiple choice questions to gain a comprehensive understanding of celestial mechanics. Prepare thoroughly for your exam!

Multiple Choice

Which two months mark the occurrence of equinoxes?

Explanation:
Equinoxes happen when the tilt of Earth's axis places the Sun directly above the equator, so day and night are about the same length. This occurs twice each year: once in March, marking the vernal (spring) equinox, and once in September, marking the autumnal (fall) equinox. The dates are roughly March 20–21 and September 22–23, which is why the two months are March and September. (The solstices, when days are longest and shortest, occur in June and December.)

Equinoxes happen when the tilt of Earth's axis places the Sun directly above the equator, so day and night are about the same length. This occurs twice each year: once in March, marking the vernal (spring) equinox, and once in September, marking the autumnal (fall) equinox. The dates are roughly March 20–21 and September 22–23, which is why the two months are March and September. (The solstices, when days are longest and shortest, occur in June and December.)

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