Initially, the astronomer who first made note of this fuzzy-looking glowing cluster thought it might be a nebula. But it’s ...

This galaxy, observed as part of the Canadian Unbiased Cluster Survey (CANUCS), is strongly lensed by a foreground galaxy ...

A mysterious cluster of 60 stars may be just another Milky Way star cluster, or it may be one of the smallest galaxies ever ...

Japanese astronomers have presented new results of observations that suggest an unidentified X-ray source designated AX ...

In this case, the lensing object is a lensing galaxy cluster called SPT-CL J0615−5746, and the background objects are the Cosmic Gems, their star clusters, and two distant lensed galaxies.

These clouds of radio energy are "radio relics" resulting from powerful shockwaves surging through the hot gas that fills the space amid a galaxy cluster. Credit: Kamlesh Rajpurohit et al / https ...

The XRISM science team, including members of Nagoya University, has explained how galaxy clusters maintain their heat despite emitting X-rays, which typically have a cooling effect on the hot gas.

Using NASA's Chandra X-ray observatory, astronomers have observed a massive and hot galaxy cluster known as PLCKG287.0+32.9 (or PLCKG287 for short). Results of the observational campaign ...

The Perseus galaxy cluster taken by the Subaru Telescope at the Mauna Kea Observatory in Hawaii. The newly discovered subcluster is on the right. Overlaid in blue is the inferred distribution of ...

The school-bus-sized observatory launched on April 24, 1990 and overcame early setbacks to become one of the most ...

This image shows quasar Markarian 231, the closest one to Earth, glowing with starlike brilliance. This image hints at two supermassive black holes spinning together at its centre. Green peas are an ...