The autumnal equinox arrives Monday, marking the start of the fall season for the Northern Hemisphere and the spring in the ...

The fall equinox marks the first day of Autumn. When does fall officially begin in 2025? This visual guide will get you oriented.

The equinox marks the arrival of fall in the Northern Hemisphere on Sept. 22. Are you ready for fall? The official arrival of fall is the autumnal equinox, which occurs in the Northern Hemisphere on ...

Day and night will get equal time for a brief moment Monday as much of the world heads into fall. The autumnal equinox marks the start of the fall season for the Northern Hemisphere and the spring in ...

Fall often doesn’t kick in until late September or early October. Daytime highs can stay summer-like well into September, but crisp nights and the first real leaf color show up around the first week ...

The change comes as part of a brand transition process the organization embarked on at the beginning of the year to embody ...

Northern Hemisphere’s fall or autumnal equinox can land between September 21 and 24, depending on the year. Its spring or vernal equinox can land between March 19 and 21.

There are strong indications Washington is moving toward hemispheric retrenchment. The consequences for the Asia-Pacific ...

The moon and Venus will shine vividly alongside a bright star in the early morning in a celestial rendezvous that should be visible across the U.S.

You still may be able to spot the Milky Way's galactic center in the night sky across the US, but time is running out.

Milky Way season in the US is coming to an end, but the iconic band of stars, our galaxy's center, should still be visible for awhile.

On Sept. 21-22, a partial solar eclipse will see the moon sweep over the sun's disk, blocking its light over a swathe of the ...