Equinox - Wikipedia
WEBA 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. [a]
What Is the Equinox? And What Is the Solstice? - timeanddate.com
WEBWhat Is the Equinox? And What Is the Solstice? By Graham Jones. Equinoxes and solstices are a result of two things: Earth’s tilt and its orbit around the Sun. Earth, like nearly all the planets, orbits the Sun in a tilted fashion. ©NASA Johnson Space Center.
Equinox - National Geographic Society
WEBOct 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.
What's the Difference Between a Solstice and an Equinox?
WEBVernal equinox (about March 21): day and night of equal length, marking the start of spring. Summer solstice (June 20 or 21): longest day of the year, marking the start of summer. Autumnal equinox (about September 23): day and night of equal length, marking the start of autumn.
Equinox | Definition, Dates, & Facts | Britannica
WEBAug 23, 2024 · equinox, either of the two moments in the year when the Sun is exactly above the Equator and day and night are of equal length; also, either of the two points in the sky where the ecliptic (the Sun’s annual pathway) and the celestial equator intersect.
Fall equinox 2024: When it is, why it happens and what to look for
WEBSep 15, 2024 · The word "equinox" is Latin for "equal night," one of two days per year when the lengths of daylight and darkness are the same across the globe. The fall equinox is an important way to mark Earth ...
What is an Equinox? | National Geographic - YouTube
WEBSep 22, 2017 · What are equinoxes? What causes these astronomical events? Find out how they influence the seasons and hours of daylight on each planet. Subscribe: http://b...
What is an equinox? | Space
WEBMar 19, 2024 · This phenomenon is called an equinox, which comes from the Latin words "aequus" (equal) and "nox" (night). What causes an equinox? The Earth orbits the sun, at a tilt of about 23.5...
Who, What, Why: What is an equinox? - BBC News
WEBSep 23, 2015 · The equinox is being celebrated around the world - heralding autumn in the northern hemisphere and spring in the south. What is an equinox and how does it work, asks Justin Parkinson.
Why the equinox ushers in the arrival of spring - National …
WEBMar 15, 2024 · Every six months, the equinox splits Earth's day almost in half. Here's how it happens—and why people have celebrated it since ancient times.