Search results
- 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).
People also ask
What is a solar equinox?
What is an equinox event?
What does a true equinox mean?
When does the equinox occur?
Learn the origin, usage and examples of the word equinox, which means either of the two times each year when the sun crosses the equator and day and night are of equal length. Find out how equinox relates to the seasons, solstices and the Gregorian calendar.
The modern definition of equinox is the instant when the Sun's apparent geocentric ecliptic longitude is 0° ( northward equinox) or 180° ( southward equinox ). [35] [36] [37] Note that at that moment, its latitude will not be exactly zero, since Earth is not exactly in the plane of the ecliptic.
An equinox is a moment when the Sun is exactly above the Equator and day and night are of equal length. Learn about the two equinoxes in the year, their dates, and how they relate to the seasons and the celestial sphere.
- The Editors of Encyclopaedia Britannica
Oct 19, 2023 · An equinox is when a planet's subsolar point passes through its Equator, creating equal day and night. Learn about the science, culture, and history of the equinoxes on Earth and other planets.
An equinox is when the Sun lies directly above Earth's equator and the day and night are almost equal. A solstice is when the Sun is at its farthest point from the equator and the day is longest or shortest. Learn how Earth's tilt and orbit cause these phenomena and how they vary on other planets.
Equinox definition: the time when the sun crosses the plane of the earth's equator, making night and day of approximately equal length all over the earth and occurring about March 21 (vernal equinox, or spring equinox ) and September 22 (autumnal equinox )..
An equinox is when the sun is directly above the equator and day and night are about the same length. Learn more about the spring and autumn equinoxes, their dates, and how they are used in astronomy and nature.
