Mercury will reach its greatest eastern elongation, marking the point where it is farthest from the Sun in the evening sky.

A green sky during a thunderstorm is an unsettling sight, but it doesn’t always signal a tornado. Here's why.

Trundling along the ecliptic plane in Virgo, our satellite hangs near the bright star Spica in the evening sky.

A rare cloud phenomenon has been spotted and photographed by eagle-eyed reader Adrian Webster. He spotted these noctilucent ...

The Fourth of July holiday will bring explosive light shows on Friday night, but many folks will see much quieter and calmer ...

The Milky Way's core will be visible this month and through August. Here's what Tennessee stargazers should know.

Auroras may be visible from Alaska to New York as an incoming solar storm could spark geomagnetic storm conditions overnight.

While recent research shows the night sky is getting brighter every year across North America, the Big Bend area has fended ...

To get a glimpse of the “Swift Planet,” EarthSky suggests waiting for the sun to set before looking west for the planet ...