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.

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 ...

Summer is ending soon, but Californians looking for signs of fall — whether in temperature or in leaves changing color — may not be satisfied with what they get. The last day of summer is just days ...

STATEN ISLAND, N.Y. — Thought it still feels a bit like winter outside, you may have noticed the sun is rising a bit earlier in the morning these days. Well, that’s about to change. When Daylight ...

Earth’s orbit around the Sun isn’t a perfect circle—it’s slightly elliptical. Each year, around July 2 or 3, Earth reaches its farthest point from the Sun, known as aphelion. Around January 2 or 3, ...