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Sep 21, 2013 · The season officially begins at 4:44 p.m. EDT during the autumnal equinox, when the sun crosses directly over the Earth's equator and both day and night are about equal. Fall will last a solid three months until the beginning of Winter on December 21, according to the U.S. Naval Observatory.
Sep 21, 2013 · The celestial event that marks this transition is called an "equinox," and it happens twice every year, around March 21 and Sept. 21. Just what is an equinox, and why does it occur?
Nov 10, 2024 · Autumn 2013 starts on Sunday, September 22nd in the Northern Hemisphere, with daylight time shortening and the leaves begining to fall with the changing tilt of the earth's axis.
- Autumn, Fall, Autumn Equinox
- Season
Sep 22, 2023 · FILE - The sun sets beyond the downtown skyline of Kansas City, Mo., as the autumnal equinox marks the first day of fall Sunday, Sept. 22, 2013. During the equinox, the Earth’s axis and its orbit line up so that both hemispheres get an equal amount of sunlight.
- mburakoff@ap.org
- Maddie is a Science Writer Based in New York.
Sep 20, 2013 · This year, fall will officially begin on Sunday, Sept. 22, and end Friday, Dec. 20. Coincidentally, fall began on the same day last year, but it usually varies according to the heavens....
The Equinox (Vernal & Autumnal) There are only two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in a "nearly" equal amount of daylight and darkness at all latitudes.
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autumnal equinox, 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.
