Two massive galaxy clusters are slamming into each other, and for once astronomers are not reconstructing the crash from the ...

Astronomers have used the Keck Observatory's DEIMOS multi-object spectrograph to observe a nearby galaxy cluster designated ...

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

Gas cloud collisions during galaxy mergers compress interstellar material, triggering new star formation, as observed in interacting systems studied by NASA and reported by Universe Today.

Astronomers have found a system of three supermassive black holes, all actively feeding, that appear to be combining into a ...

The system is known as J1218/1219+1035, and is located 1.2 billion light-years from us. The three nuclei of the three ...

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

Astronomers have confirmed the first known triple system in which all three galaxies host actively feeding, radio-bright ...

Monisha Ravisetti was a science writer at CNET. She covered climate change, space rockets, mathematical puzzles, dinosaur bones, black holes, supernovas, and sometimes, the drama of philosophical ...

Using the James Webb Space Telescope to look back in time at the early universe, astronomers discovered a surprise: a cluster of galaxies merging together around a rare red quasar within a massive ...

The whole universe knows when a supermassive black hole is eating: these monstrously massive objects at the hearts of galaxies feast on infalling matter, and that process generates radiation so bright ...