equinox

Animation

equinox

Animation

An equinox is a date of the year when daylight and nighttime each last 12 hours everywhere on Earth. On all other days of the year, day and night last different amounts of time, and differ in length from location to location on Earth. There are two equinoxes each year. They occur when the plane of Earth's tilt is tangent to its orbital plane. As a result, neither hemisphere is tilted toward or away from the Sun.


Grade(s) 9-12

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