The Vera C. Rubin Observatory in Chile has begun generating test images of the night sky, but the big reveal is expected ...

From Lowell Observatory to Kitt Peak to Mount Graham, here are the 11 best planetariums and observatories in Arizona and everything you can do there.

After more than a decade of mapping billions of stars across the Milky Way and beyond, a groundbreaking spacecraft is ...

Photos from the Mount Washington Observatory show the amount of snow that was lost in a 24-hour period amid the warm April temperatures.

A newly discovered comet, called C/2025 F2 (SWAN), may have disintegrated. But the remnants are still visible.

Organizers say the demonstrations are expected in cities across the U.S., focused on different issues and with ‘day of action ...