Once upon a time, Earth may have sported a planetary ring of its very own ... The four giant planets have rings, and there's ...

Ancient supernovas may have blasted Earth with powerful radiation, causing dramatic changes in our climate and could do so again, posing a threat to life. Skip to main content Open menu Close menu ...

Astronomers have called for help to identify a mystery object that may have hit Saturn on Saturday in what could be the first ...

How did Earth, alone among the Solar System's rocky planets, become the home for life? How, among all this frigid ...

We may already have had our first-ever encounter with dark matter, according to researchers who say a mysteriously high-energy particle detected in 2023 is not a neutrino after all, but something ...