A minor-to-moderate geomagnetic storm is expected Saturday night, the National Oceanic and Atmospheric Administration said.

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point ...

More states in the northern U.S. will have a chance of seeing aurora borealis on Friday, as high-speed winds from a spot on ...

The zodiacal light shines in the evening as the Moon reaches Last Quarter and skims past Spica and Antares in the sky this ...