You might hear the term "autumn equinox" tossed around Sept. 22 on the first day of fall. But what exactly does that mean? Is it different from a solstice? Yes, actually. They mark seasonal changes ...

Twice a year, the sun doesn’t play favorites. Everyone on Earth is seemingly on equal status – at least when it comes to the amount of light and dark that they get. On Monday, we enter our second and ...

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 ...

What is the autumnal equinox? The autumnal equinox marks the start of autumn in the Northern Hemisphere. The Earth travels around the sun at an angle, and for most of the year, the Earth’s axis is ...

A NASA and NOAA weather satellite captured this image of an autumnal equinox in 2019. Are you ready for fall? The official arrival of fall is the autumnal equinox, which occurs in the Northern ...

September's (sporadic) sweater weather chill and the changing leaf colors are a sign that the first day of fall is near. Here's what to know about the autumnal equinox and fall foliage forecast map ...

The fall season is here, as marked by the autumnal equinox, which will happen Monday. The autumnal equinox will occur Monday, Sept. 22, at 12:19 p.m. MT/1:19 p.m. CT, signaling the end of summer. The ...

Add Yahoo as a preferred source to see more of our stories on Google. You might hear the term "autumn equinox" tossed around Sept. 22 on the first day of fall. But what exactly does that mean? Is it ...