P.M. EDT, marking the official beginning of summer for those in the Northern Hemisphere. On this date, the Sun is located ...

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

The best time to see noctilucent clouds is on clear nights between late May and mid-August, about 90 to 120 minutes after sunset or before sunrise. Sightings are most common during June and July.

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

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, ...

Noctilucent clouds over the ... surface and about 11 miles above the ground, these appear in the mesosphere, up to 50 miles high. They become visible right after sunset or right before sunrise ...

The summer evenings offer us the opportunity to sight some rather intriguing and beguiling phenomena. Noctilucent clouds, ...

Cumulus clouds, with their distinct ... somewhere with a clear view of the sky and a flat horizon—like an open field—about an hour or two after sunset or just before sunrise.