This article (originally published Aug. 13, 2025) has been updated to include new text and illustrations featured in the Jan.

In 1181 AD, a bright "guest star" was observed to linger in the sky for around six months. Nearly 850 years later, the likely ...

Over the roughly 4.5 billion years of Earth's existence, there have been several periods were biodiversity has been nearly wiped out - extinction events. There have been several proposals to explain ...

Scientists have detected the most distant supernova ever seen, exploding when the universe was less than a billion years old.

NASA has captured 25 years of observations from the Chandra X-ray Observatory showing the aftermath of Kepler’s Supernova, a ...

A distant star explosion could have been responsible for a massive extinction event on Earth. A new paper suggests that a star some 65 light-years from Earth may have exploded into a supernova, and ...

Astronomers have spotted AT2025ulz, a rare dual explosion — a supernova and a kilonova — that may be the first-ever observed ...