Evidence that Russia is racing to perfect a nuclear-armed spacecraft to target Western satellites is sparking the U.S. and ...

According to scientists, red supergiant stars should produce more supernovas. But astronomers just aren’t spotting them. Here ...

COLORADO SPRINGS–Thirteen years ago a 20-m asteroid streaked without warning into Earth’s atmosphere before exploding over the Russian city of Chelyabinsk, injuring 1,500 people and causing widespread ...

NASA’s Hubble telescope captured an “extraordinarily” rare moment of a comet exploding into fragments, the space agency said. The comet K1, whose full name is C/2025 K1 (ATLAS), was caught fragmenting ...