Monday, Sept. 22 is the autumn equinox, marking the first day of astronomical fall. Beginning dates of meteorological and ...

SALT LAKE CITY — The Sept. 22 autumn equinox provided most of the world with nearly equal durations of day and nighttime, while also marking the first day of astronomical fall. But to meteorologists, ...

The official beginning of fall in the Northern Hemisphere is on Sept. 22, at 2:19 EST. AccuWeather's Melissa Constanzer explains what happens during the autumnal equinox and why this event occurs.

Fall begins in the Northern Hemisphere on Monday, Sept. 22, when Earth experiences equal day and night, known as the autumnal equinox. While fall officially begins with the autumnal equinox, if you ...

The article recounts the author's personal journey into astronomy, highlighting several influential beginner astronomy guidebooks from various eras, including "Stars: A Guide to the Constellations," ...

For the past decade, gravitational wave astronomy has opened our eyes to amazing cosmic phenomena thanks to LIGO, the Laser Interferometer Gravitational-wave Observatory. Bob McDonald celebrates LIGO ...

UC Riverside has developed a technology that enables scientists to peer deeper into the universe. Gravitational-wave science ...

Florida has officially entered fall with the autumnal equinox, but the season will still feel summer-like. While daylight ...

However, it will set only one minute after sunset, making sighting impossible that evening. As a result, the first day of ...

Astronomy experts will be on hand beginning at 7 p.m. today to help visitors navigate the night skies and discover planets in ...