Scientists using the XRISM satellite have uncovered a major clue to one of astronomy’s longstanding mysteries: why galaxy ...

The Chandra X-ray Observatory view of galaxy group NGC 4839 has revealed that it is "plunging into the Coma galaxy cluster ...

Firefly Sparkle,” a galaxy that existed about 600 million years after the big bang, has been imaged by the James Webb Space ...

Scientists discovered one other curiosity between the relics: a faint glow at the center of the cluster. This could be a ...

The largest sample of galaxy groups ever detected has been presented by a team of international astronomers using data from the James Webb Space telescope (JWST) in an area of the sky called COSMOS ...

The word itself comes from galaktikós kyklos, or “milky circle,” the ancient Greek term for the Milky Way, our home galaxy.

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

The most recent measurement of a nearby galaxy cluster is deepening a disagreement about how fast the universe is expanding — ...

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

Initially, the astronomer who first made note of this fuzzy-looking glowing cluster thought it might be a nebula. But it’s not. M3 is what’s called a globular cluster. Scientists believe it’s 11 to 13 ...

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 galaxy’s sweeping spiral arms are filled with young blue star clusters and ionized hydrogen gas, indicating rapid star formation. Astronomers believe its bar-like structure channels gas ...