the galaxy cluster that includes the milky way is called the local group.
the galaxy cluster that includes the milky way is called the local group.
the galaxy cluster that includes the milky way is called?
the local group
one such frame of reference is the hubble flow, the apparent motions of galaxy clusters due to the expansion of space. individual galaxies, including the milky way, have peculiar velocities relative to the average flow. thus, to compare the milky way to the hubble flow, one must consider a volume large enough so that the expansion of the universe dominates over local, random motions. a large enough volume means that the mean motion of galaxies within this volume is equal to the hubble flow. astronomers believe the milky way is moving at approximately with respect to this local co-moving frame of reference. the milky way is moving in the general direction of the great attractor and other galaxy clusters, including the shapley supercluster, behind it. the local group (a cluster of gravitationally bound galaxies containing, among others, the milky way and the andromeda galaxy) is part of a supercluster called the local supercluster, centered near the virgo cluster: although they are moving away from each other at as part of the hubble flow, this velocity is less than would be expected given the 16.8 million pc distance due to the gravitational attraction between the local group and the virgo cluster.
milky way
cl j1001+0220 is, as of 2016, the most distant known galaxy cluster. discovered in 2016 by the chandra x-ray observatory in conjunction with the eso's ultravista telescope and the atacama large millimeter array, it has a redshift of z=2.506, placing it at a distance of 11.1 billion light-years from earth. the galaxy cluster appears to be undergoing the transformation from a galaxy cluster that is still forming, a proto-cluster, to a mature cluster, and it is the first such cluster observed in this stage of its evolution. the cluster consists of seventeen galaxies, and nine of the eleven massive galaxies closest to its centre are starburst galaxies, forming new stars at the rate of about 3,400 suns per year. in contrast, the milky way produces only the equivalent of one sun per year, so these galaxies at the core of the cluster are producing stars at a rate three hundred times greater than the milky way on average. other galaxy clusters at ten billion light years and closer have far less star formation, and this suggests that star formation slows down in large galaxies within clusters after the galaxies have already come together during the development of a galaxy cluster.
cl j1001+0220