Galaxy Clusters and Groups
41 entries in the Galaxy Clusters and Groups compendium.
Galaxy groups and clustersLargest gravitationally bound objects in cosmic structure formation.Galaxy clusterLargest gravitationally bound structures, composed of galaxies, gas, and dark matter.Galaxy groupThe smallest and most common galaxy aggregates in the universe.Butcher–Oemler EffectHypothesis that distant cluster cores have more blue galaxies.Cooling flowPredicted rapid cooling of intracluster medium in galaxy clusters.Galactic orientationSpatial orientation of a galaxy's plane relative to Earth.Intracluster mediumSuperheated plasma permeating galaxy clusters, emitting strong X-rays.Radio relicsElongated radio sources in cluster peripheries tracing shocks or fossil plasma.Abell 68Massive galaxy cluster known for strong gravitational lensing.Abell 222Galaxy cluster linked to Abell 223 by dark matter filament.Abell 370A distant galaxy cluster known for gravitational lensing and the Dragon Arc.Abell 520A merging galaxy cluster with a disputed dark core.Abell 754A massive, merging galaxy cluster in Hydra.Abell 1033A galaxy cluster with reborn radio emission from a shock wave.Abell 2142A massive merging galaxy cluster studied in X-rays.Abell 2163Richest, hottest Abell cluster; merging; faint weak lensing signal.Abell 2218A galaxy cluster that magnifies distant galaxies through gravitational lensing.Abell 2255A rich, nearby galaxy cluster with a turbulent intracluster medium.Abell 2744A giant merging cluster with high dark matter and strong lensing.Abell 3266A large southern galaxy cluster with a fast-moving gas mass.Abell 3744Galaxy cluster hosting two prominent radio galaxies.Abell 133A dynamically complex cluster with a radio relic and cooling core.Abell 478X-ray luminous cluster with one of the largest cooling flows.Abell 1413A rich type I cluster with an extreme brightest cluster galaxy.Abell 2147A galaxy cluster in the Hercules Superclusters core.Abell 2390Massive X-ray rich cluster with a cooling core.Abell S1063A gravitational lens revealing faint galaxies from the early universe.Antlia ClusterThird-nearest galaxy cluster to the Local Group.Bullet ClusterColliding galaxy cluster pair providing evidence for dark matter.Bullet GroupA merging galaxy group showing dark matter–baryon separation.CL J1001+0220Most distant known galaxy cluster, caught in transformation.CL0024+17A galaxy cluster revealing dark matter through gravitational lensing.Coma ClusterA rich galaxy cluster with over 1,000 members and abundant dark matter.Coma IA spiral-rich galaxy group infalling into the Virgo Cluster.Copeland SeptetA compact group of eight interacting galaxies in Leo.El Gordo (galaxy cluster)A massive distant galaxy cluster composed of two colliding subclusters.Eridanus GroupA nearby loose galaxy group with intermediate structure and many S0 galaxies.Gioiello (galaxy cluster)Most distant massive galaxy cluster known.HCG 3A compact group of four galaxies in Cetus.Hickson 40A compact merging galaxy group in Hydra.Hickson 74A compact group of five galaxies dominated by NGC 5910.
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