Videos from Yosemite National Park show the iconic "Firefall" phenomenon glowing at Horsetail Fall inside the park.

SACRAMENTO, CA — The western sky offered competing features Monday night as the glowing red sunset and crescent moon ...

NASA’s Curiosity rover captured stunning images of Martian twilight clouds, revealing iridescent dry ice formations on Mars.

The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).

In Hiroshima, Trang heard about survivors of the atomic bombing of the city who say they do not like to see a glowing sunset because it reminds them of the red sky that appeared when the bomb was ...

More realistically, here’s when to much more easily see the crescent moon and “Da Vinci glow” as the crescent rises slightly higher into the post-sunset sky each night. Look southwest.