Is it a full moon tonight? Wondering what is the planet and bright star shining next to the moon? Here's what to know and how ...

The autumnal equinox arrives Monday, marking the start of the fall season for the Northern Hemisphere and the spring in the ...

Day and night will get equal time for a brief moment Monday as much of the world heads into fall. The autumnal equinox marks ...

Here's what happens as the direct rays of the sun slip south of the equator as the seasons change.

Bring out your sweaters, light a scented candle, and grab a pumpkin spice latte – the official start of fall is almost here.

The bottom half of the world, known as the Southern Hemisphere, is about to be treated to a partial solar eclipse that won't be visible in the US.

Did you see the bright star next to the moon? That was Venus, and part of a conjunction between the moon, Venus and the star ...

This weekend's September new moon will rise amid a partial solar eclipse, giving way to the autumnal equinox. Here's when, where it will be visible ...

Northern Hemisphere’s fall or autumnal equinox can land between September 21 and 24, depending on the year. Its spring or vernal equinox can land between March 19 and 21.

Fall often doesn’t kick in until late September or early October. Daytime highs can stay summer-like well into September, but crisp nights and the first real leaf color show up around the first week ...

Here’s what experts are learning about this chaotic period leading up to menopause—including what causes its symptoms, when ...

Much as we may treasure and proclaim our independence, we actually live in a protective bubble called the heliosphere.