At the center of the galaxy Markarian 501, two black holes appear to orbiting each other – and they could collide in less ...

Astronomers discover two giant black holes set to collide in 100 years and detect key signals from Markarian 501.

An image captured by an amateur astrophotographer shows a spectacular cosmic phenomenon: the encounter of two galaxies, NGC 4038 and NGC 4039, known as the Antennae Galaxies. This merger ...

Astronomers have found a rare heart‑shaped structure in space created when two galaxies collide. The 'romantic' heart is ...

A nearby galaxy long treated as a stable cosmic reference is revealing a far more dynamic and turbulent history.

Astronomers have detected the most distant and brightest "space laser," a megamaser, originating from a galactic collision ...

A fleet of NASA missions has likely uncovered a collision between two ultradense stars in a tiny galaxy buried in a huge stream of gas. Astronomers have never seen this type of explosive event in an ...

CAPE CANAVERAL, Florida — The Sombrero galaxy and its glowing halo of stars have never looked this good. The U.S. National ...

TUCSON, Ariz. (KVOA) - The Small Magellanic Cloud (SMC), one of the Milky Way's closest galactic neighbors, is undergoing a transformation visible from the southern hemisphere. This change is due to a ...