The Sun crosses the Celestial Equator this week, but what exactly does that mean?

Friday brought us what we call “the first day of spring.” But announcing spring is an arbitrary declaration, as we saw by ...

However, twice a year—during the spring (vernal) and autumn (autumnal) equinoxes—the Earth’s axis is tilted neither toward ...

The 2026 spring equinox is nearly here and will bring more daylight and warmer temperatures to parts of California.

Welcome to spring! It rolled in at 10:46 a.m. Friday morning with temperatures around freezing for many.

It's almost time to get your coats out, pour yourself a large pumpkin spice latte, and start picking your conkers. That's because autumn officially begins tonight! The autumn equinox takes place at 19 ...