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

Microsoft has resolved a known issue that triggers Cluster service and VM restart issues after installing July's Windows Server 2019 security updates.

While they outwardly resemble classic star clusters, they have unusually high mass-to-light ratios; some are hundreds to thousands of times higher than those of typical dwarf galaxies.

A cluster of earthquakes shook parts of the Sonoma County region Thursday morning, according to the U.S. Geological Survey, which tracks seismic activity.

NGC 6910 is a bright open cluster in Cygnus the Swan, visible overnight as the Summer Triangle flies high around local midnight.

The mysterious substance called dark matter is intrinsically invisible. It cannot be directly observed—rather, its presence is inferred by its gravitational influence on the universe, such as ...