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- DictionaryE·qui·nox/ˈekwəˌnäks/
noun
- 1. the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length (about September 22 and March 20).
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Equinox is a noun that means either of the two points or times each year when the sun crosses the celestial equator and day and night are of approximately equal length on earth. Learn more about the etymology, history, and examples of equinox from the Merriam-Webster dictionary.
Equinox. A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September.
Mar 19, 2024 · An equinox is when the Sun is exactly above the Equator and day and night are of equal length. Learn about the vernal and autumnal equinoxes, their dates, and their astronomical coordinates from Britannica.
- The Editors of Encyclopaedia Britannica
An equinox is the time when the sun crosses the plane of the earth's equator, making day and night of equal length. Learn the origin, meaning, and usage of the word equinox, and see examples of sentences and related words.
Oct 19, 2023 · An equinox is an event in which a planet’s subsolar point passes through its Equator. The equinoxes are the only time when both the Northern and Southern Hemispheres experience roughly equal amounts of daytime and nighttime. Learn about the science, history, and culture of the equinoxes, and how they affect satellites and planets.
An equinox is when the Sun lies directly above Earth's equator, and the day and night are almost equal in length. A solstice is when the Sun reaches its highest or lowest point in the sky, and the day is longest or shortest. Learn how Earth's tilt and orbit cause these phenomena.
An equinox is when the sun is directly above the equator and day and night are about equal in length. Learn more about the spring and autumn equinoxes, their dates, and how they are used in astronomy and nature.
