A galaxy cluster is a structure that consists of hundreds of galaxies bound by gravity. Galaxy clusters are much larger than galaxy groups. One of the key features of clusters is the Intracluster medium or ICM. The ICM consists of gas between the galaxies and has a temperature on the order of 7-9 keV. Clusters of galaxies should not be confused with star clusters such as open clusters, which are structures of stars within galaxies, as well as globular clusters, which typically orbit galaxies.
Located some 62 million-light years away, the Dorado constellation is home to a galaxy cluster, called the Dorado Group, comprised of around 70 galaxies. A pretty massive figure by all accounts, considering the Local Group, which also include the Milky Way, contains a mere 30 galaxies under its belt. Recently, Hubble captured a splendid photo [...]
Whenever a massive object, with an equally massive gravitational pull, like black holes or galaxy clusters, falls between an observer, say a telescope, and a distant target in the background to be observed, than a gravitational lens is formed. Light emitted from the distant object gets twisted by the massive object, and ends up distorted [...]
The ever scientifically productive Hubble just came out with another gem that will help scientists unravel the mysteries of the Universe, after the telescope snapped a photo of a couple of galaxy far, far away, wrapped together in a cosmic dance which most likely led in in the forming of a galaxy cluster – the [...]
Galaxy clusters are the biggest stable structures in our Universe that we know of, typically containing 50 to 1000 galaxies. El Gordo Seven billion light years away and two million billion times heavier than our Sun lies El Gordo – which is Spanish for ‘the fat one’. Astronomers reporting at the 219th American Astronomical Society [...]