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

The Earth is prone to more geomagnetic storms during the spring and fall equinoxes than throughout the solstices.

The autumnal equinox brings fall to the Northern Hemisphere today as the sun passes directly over the equator at noon. But are day and night actually equal length today?

Even though pumpkin spice-flavored everything made a premature return to menus and store shelves everywhere, the first day of fall is actually this Sunday. Sept. 22, marks the first day of the autumnal equinox in the Northern Hemisphere,