A galaxy cluster is a massive are where hundreds, or even thousands, of galaxies are present. So, having two separate galaxy ...

New JWST observations of the Phoenix Cluster of galaxies support a theory about star formation that other clusters challenge.

Discover the latest images of galaxies that highlight stunning stars, dust clouds, and magnificent cosmic formations across ...

Galaxy cluster Abell 1489, as imaged by the International Gemini Observatory, contains more than 200 of the gravitationally-bound systems of stars, stellar remnants, interstellar gas and dust.

Abell 2255 is a cluster containing between 300 and 500 constituent galaxies, many of which are merging. It's located around 800 million light-years from Earth and spans around 16.3 million light ...

Faint Bridge of Stars Reveals Rare Galactic Merger Astronomers have created one of the most detailed views ever captured of a galaxy cluster located 700 million light-years away, revealing a delicate ...

Galaxy clusters are often described by superlatives. After all, they are huge conglomerations of galaxies, hot gas, and dark matter and represent the largest structures in the Universe held ...

In the past decade, the European Space Agency's Gaia space telescope has revealed the nature, history, and behavior of ...

Ursa Major III, the faintest object in our galaxy, orbits the Milky Way at a distance of more than 30,000 light years. Until ...

Huge galaxy cluster is wrapped in a cocoon 20 million light-years wide, NASA space telescope finds This galaxy cluster has mysterious cosmic tendrils over 200,000 light-years long (image) ...

"Galaxy clusters are also dominated by dark matter," Jacqueline McCleary, assistant professor of physics at Northeastern University, said in a statement.

To understand the origin of galaxy clusters, Masami Ouchi, currently at the Space Telescope Science Institute, decided to study how galaxies approximately 12.7 billion light years away (a red ...