Once upon a time, Earth may have sported a planetary ring of its very own ... The four giant planets have rings, and there's evidence that Mars has had one, too. This raises the question: could Earth ...

Saturn is a planet widely recognisable for its iconic rings but a new study suggests Earth may also have had a similar ring system over 50 million years ago. As part of the research, 21 asteroid ...

An infinity symbol–shaped galaxy hosts an active supermassive black hole. The growing giant may have come from the aftermath of a galactic smashup.

Astronomers have likely witnessed a planet forming in real time, seen inside a spiral arm of the HD 135344B protoplanetary ...

"We will never witness the formation of Earth, but here, around a young star 440 light-years away, we may be watching a ...

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.