It's almost time to fall into fall, though in many parts of the country, it feels like we're already there. There are ...

During an equinox, places around the globe experience nearly equal amounts of daytime and nighttime. The second occurrence ...

Sept. 22, day and night will be nearly equal in length as Earth spins side-on to the sun and autumn officially begins in the ...

Twice a year, the sun doesn’t play favorites. Everyone on Earth is seemingly on equal status – at least when it comes to the ...

On Sept. 22, the fall equinox formally heralds in autumn and marks the end of summer in the Northern Hemisphere.

During the September equinox, the sun’s direct rays cross Earth’s equator into the Southern Hemisphere, where winter is ...

The first day of fall arrives on Sunday with the autumn equinox, starting shorter, colder days because of Earth's axis and ...

Explaining equinoxes Equinoxes occur in between the solstices and signal the beginning of spring and autumn. The term equinox ...

However, fall is already in full swing for meteorologists. Unlike the astronomical equinoxes and solstices, fall is based on ...

The official start to the fall season, the autumnal equinox, occurs on Sunday, Sept. 22. What exactly happens during the ...

Winter solstice for the Northern Hemisphere falls on Dec. 21 this year. Earth-watching satellites up in orbit have a unique view of the equinox. A NASA Earth Observatory video shows Earth from ...