Scientists are taking the once-radical concept of dimming the sun through stratospheric aerosol injection (SAI) seriously, ...
On the day of the 2025 autumnal equinox, the sun rises almost exactly due east and sets to the west. The months that follow ...
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 ...
This story was updated to add new information. Spring has sprung, bringing warmer days and blooming flowers. Thursday is the first day of spring, or the vernal equinox, in the Northern Hemisphere.
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