More than 99% of Americans live under skies polluted by light. But dark skies at the Grand Canyon and more than 145 other ...

Called Olbers’ paradox, the seemingly simple mystery of the sky’s darkness is something that stumped astronomers for ...

As dark sky sanctuaries grow in popularity, scientists are revealing more of the benefits of darkness—from repairing DNA to improving your mental health.

In 774 AD, a large red cross illuminated the night sky over England, causing a significant stir among the Anglo-Saxons. It ...

This is perhaps best encapsulated in a Walt Whitman poem titled “When I Heard the Learn’d Astronomer.” The narrator describes ...

Every August, the Perseid meteor shower lights up the night sky with a spectacular display of meteors. Here is a gallery of some of the best images from around the world A member of an ...