The Milky Way can be seen between trees. (WTOP/Greg Redfern) Fall officially arrives Monday, Sept. 22 at 2:19 p.m. Astronomically speaking, this is the date and time of the autumnal equinox, the ...

For the second time in 2025, an incredible astronomical event is about to change the seasons on Earth. The September equinox is almost upon us, with autumn about to begin in the Northern Hemisphere, ...

The autumn equinox is now upon us! Today marks the moment that the sun crosses the celestial equator, ushering in the beginning of astronomical autumn in the northern hemisphere, which brings with it ...

Spring officially begins today (March 20) with the vernal equinox, bringing longer days and warmer temperatures to the Northern Hemisphere. The vernal equinox signals the astronomical start of spring ...

When does fall begin in the Northern Hemisphere? Whereas a meteorologist might tell you Sept. 1, the beginning of meteorological fall, an astronomer will inform you that seasons pivot on solstices and ...

The autumnal or fall equinox arrives on Monday, September 22, 2025, at 2:19 P.M. EDT, bringing with it the sound of dead leaves, the rich rot of pumpkin spice and the distant echo of frost. An equinox ...