The autumn equinox marks the end of summer and the beginning of fall in the Northern Hemisphere. In 2025, the first day of fall will be Monday, Sept. 22. During the equinox, the sun crosses directly ...
A NASA and NOAA weather satellite captured this image of an autumnal equinox in 2019. Are you ready for fall? The official arrival of fall is the autumnal equinox, which occurs in the Northern ...
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