Three merging galaxies host three active black holes, offering rare insight into galaxy and black hole growth.

Three galaxies were found in the merger of a triple system, which was rare in itself, and might help observe hierarchical ...

Galaxy merger Arp-Madore 417-391 is on display in this new image captured by the Hubble Space Telescope's Advanced Camera for Surveys (ACS). The merger is about 670 million light-years away from Earth ...

A rare cosmic alignment has revealed three supermassive black holes blasting radio jets at the same time inside a tangled ...

Astronomers noticed something odd while reviewing radio data from distant space. Three bright signals appeared close together ...

In a groundbreaking astronomical discovery, researchers have unveiled a cosmic event of immense scale: a trio of galaxies, each hosting a supermassive black hole, is on a collision course. Located ...

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

A languid spiral galaxy appears draped against deep space in a stunning new image from the European Space Agency’s Euclid ...

The schematic artistic view of the Cosmic Owl, consisting of twin collisional ring galaxies with binary AGN. Credit: arXiv (2025). DOI: 10.48550/arxiv.2506.10058 An international team of astronomers ...

Astronomers have confirmed the first known triple system in which all three galaxies host actively feeding, radio-bright supermassive black holes. The system is cataloged as J1218/1219+1035 and is ...