Science news articles about 'autumnal equinox'

Will day and night really be equally long on September 22, 2009, the autumnal equinox (or fall equinox)? Get the answer—and other first-day-of-fall facts.

... time in more than a decade, the full moon will shine over the first day of fall. Get the facts in our autumnal equinox explainer. Equinox - Full moon ...

Stars and planets are lining up for the change of seasons during the Northern Hemisphere's autumnal equinox this year.

The Northern Hemisphere's autumnal equinox occurs September 22—find out why it's the first day of fall.

... at its fastest for the year when it crosses the celestial equator at the autumnal equinox on the 23d. As darkness arrives earlier, the daily westwards shift of our evening sky appears ...

The full moon known as the annual "Harvest Moon" occurs closest to the autumnal equinox.

... intense downpours during Titan's vernal and autumnal equinoxes -- enough liquid to carve out the type of channels that Huygens found. With the model, the researchers can now explain ...

... reached the centre of the chamber during the equinoxes, in the spring and autumn, three hours after sunrise" explains ... hides to the West. The opposite occurred during the autumn equinox. Taurus and Scorpio were of special significance ...