"There are only two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in a ...

Fall officially starts in just a few days. Here is everything to know about the last day of summer, what an equinox is and why it's so important.

In the Pacific Northwest weather region — which includes western Washington, western Oregon and part of northern California — ...

The continents are drying, freshwater availability is shrinking, and sea level rise is accelerating… Combined, they send ...

There are strong indications Washington is moving toward hemispheric retrenchment. The consequences for the Asia-Pacific could be dramatic.

Three celestial bodies will meet up for one night in September in a cosmic conjunction that should be widely visible in the ...

On Sept. 21-22, a partial solar eclipse will see the moon sweep over the sun's disk, blocking its light over a swathe of the ...

The autumnal equinox happens on Sept. 22, marking the first day of fall. The season is also when clocks are turned back an ...

This Sunday, a partial solar eclipse is taking place just hours before the September equinox flips Earth's seasons. Here's ...

A rare Black Moon is about to pass through the night sky. Here's what to know about "seeing" this unique point in the moon's lunar cycle.

The full corn moon in September marks the time when corn is harvested in much of the northern United States, according to The ...