When two black holes spiral together and merge, they send ripples through spacetime that detectors on Earth can pick up.

Astronomers have been watching the supergiant WOH G64 for decades – and it might have turned into a hypergiant and be heading ...

The Perseus Cluster is a massive galaxy cluster located in the constellation Perseus. It is one of the largest structures in ...

New research led by Gonzalo Muñoz-Sanchez at the National Observatory of Athens, published in Nature Astronomy, finds that ...

When Japan’s Hitomi satellite trained its X-ray spectrometer on the Perseus Cluster in early 2016, it had just weeks to live.

President Donald Trump has again denied a request from Colorado’s governor to help people affected by wildfires and flooding.