For more than a century, astronomers have known that some “new stars” flaring into view are not births at all but violent ...

Observing the Universe often means contemplating phenomena that occurred millions of years ago. But sometimes, the opportunity arises to capture a cosmic event almost in real-time, as if we were ...

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

Astronomers may have discovered the first example of an explosive cosmic event called a "superkilonova," in the form of a gravitational wave signal detected on Aug. 18, 2025.