The blast may have been a kilonova — a type of neutron star merger — in the wake of a more traditional supernova.

A newly revealed cosmic image shows two galaxy clusters colliding as one. Nicknamed the Champagne Cluster, it offers rare ...

Galaxy mergers are not uncommon throughout the Universe; in fact, they're thought to be one of the major mechanisms whereby ...

What seemed like new planets around Fomalhaut were actually expanding dust clouds from violent planetary collisions seen by Hubble.

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

Some discoveries emerge softly, with no explosions or satisfying conclusions. Astronomers were watching a distant flare from ...

In a patch of sky about 1. 2 billion light-years from Earth, astronomers have found a cosmic rarity: three galaxies caught in ...

Astronomers tracking a nearby star system thought they had spotted an exoplanet reflecting light from its star. Then it ...

A new composite image reveals the “Champagne Cluster” as two massive galaxy clusters caught in a rare, violent collision.

This artist’s concept shows the violent collision of two massive objects in orbit around the star Fomalhaut. This artist’s concept shows the violent collision of two massive objects in orbit around ...

Around the nearby star Fomalhaut, asteroids are smashing into each other in a series of cosmic cataclysms, creating huge clouds of dust. For the first time, astronomers are watching one of these ...

Astronomers have found three supermassive black holes on a collision course in a rare cosmic event, situated nearly 1.2 ...