From meteor showers to constellations, here's everything you need to know about observing the summer sky using the unaided ...

Astronomers have solved a cosmic mystery, revealing the long-hidden object that collided with the Perseus cluster in a vast-scale hit-and-run billions of years ago. Composed of thousands of ...

"All the odd shapes and swirling gas observed in the Perseus cluster now make sense within the context of a major merger." Astronomers have discovered a long-missing element of a galactic ...

The Perseus cluster is enormous ... Using the Subaru/Hyper Suprime-Cam and archival data from the Sloan Digital Sky Survey, researchers have mapped the subtle alteration that the presence of ...

An international team of astronomers has solved one of the longstanding cosmic mysteries by uncovering direct evidence of a massive, long-lost object that collided with the Perseus cluster.