They Glow After Sunset In The Northeastern Night Sky Noctilucent clouds can only be seen at twilight ... They do so because, during the observation season, the sun is never far beneath the ...

Leo sees action as both Mars and Comet Schwassmann-Wachmann 1 move through; plus, spot galaxies and noctilucent clouds in the sky this week.

The best time to see noctilucent clouds is on clear nights between late May and mid-August, about 90 to 120 minutes after ...

During the week ahead, watch for Mars in the evening sky as it moves its way slowly night by night, left to right, above the bright star Regulus in the constellation of Leo, the Lion, situated above ...

If you live in the southern hemisphere and have been stopped in your tracks by a recent sunset, you may have noticed they ...

There are 10 main types of clouds. There's the Cumulus cloud, otherwise know as the Simpsons' cloud. "The cartoon cloud that forms on a sunny day. The fair weather cloud. It's like the generic one, ...

Fireflies need darkness to communicate. Males perform an airborne dance while flashing their abdominal lanterns in a pattern ...

Incredible footage of a sunset over the Grand Canyon in Arizona bathes the canyon in yellow and orange against the darkening blue sky.

Rare noctilucent clouds are showing up in places they never used to, and scientists are trying to find out why.

Have you ever gazed up at the sky and wondered why clouds look so incredibly different from one another? One moment, you spot ...

The origins of noctilucent clouds are still mysterious. Unlike other spectacular night sky displays like aurora borealis, ...

This month's night sky is filled with close-range meteors, swirling nebulas, and prime stargazing conditions. Here’s when you ...