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 ...

Stargazers in the U.S. will witness the razor-thin waning crescent moon rise close to Venus and the bright star Regulus in ...

Fall equinox 2025 arrives on Monday 22. Find out why the first day of autumn still features a little more daylight than ...

Watch the crescent moon, Venus and the bright star Regulus align in a rare predawn close conjunction tomorrow.