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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.
- Equinox
equinox, either of the two moments in the year when the Sun...
- Seasons
Season, any of four divisions of the year according to...
- Autumn
autumn, season of the year between summer and winter during...
- First Day of Fall
The autumnal equinox is one of only two days—the other is...
- Equinox
15 wrz 2024 · While meteorologists like to call fall at the beginning of September, astronomical autumn starts later, on the autumnal equinox. This year, it falls on Sunday, Sept. 22 at 8:44 a.m. EDT (12:44...
Fall begins with the autumnal equinox, when day and night are almost equal. Learn when the equinox is in different hemispheres, how to measure fall, and what traditions and festivals celebrate it.
6 wrz 2024 · When does autumn begin this year? What is the equinox? And when do the clocks go back? Simon King has the answers.
4 dni temu · In 2024, the autumnal (fall) equinox arrives on Sunday, September 22, marking the official first day of fall. Here's everything you should know about the fall equinox—plus our favorite fall facts, folklore, photos, and more!
18 wrz 2017 · The 2024 fall equinox—also called the autumn equinox—takes place on Sunday, September 22, 2024. The fall equinox is not on the same day each year, though it always falls between September...
12 wrz 2024 · The autumnal equinox (as well as spring equinox) is the moment when neither of the Earth’s hemispheres is inclined towards or away from the Sun. When is it? In the Northern Hemisphere, the closest autumnal equinox will take place on September 22, 2024, at 12:44 GMT (08:44 a.m. EDT).