Galaxy Cluster

A grouping of galaxies. The Milky Way belongs to a small cluster known as the Local Group, but other clusters can contain hundreds or thousands of galaxies. Clusters of galaxies, in turn, can group together to form superclusters.

Radio Programs

Emptiness Vast “voids” between galaxies Tuesday, July 21, 2015
Hercules Cluster Stirring up a cluster of galaxies Thursday, May 14, 2015
Galactic Companions Like looking in a galactic mirror Sunday, April 12, 2015
Pandora’s Cluster Mapping a galactic pile-up Tuesday, March 10, 2015
On the Frontier Pushing the intergalactic frontier Monday, March 9, 2015
Great Wall A wall of galaxies across the universe Monday, November 17, 2014
Coma Galaxy Cluster A brilliant cluster of galaxies Friday, April 19, 2013
Fire and Water Fire and water in the night sky Saturday, December 3, 2011

Featured Images

Hubble Space Telescope image of spiral galaxy Messier 66
Evidence of an Encounter Sunday, April 12, 2015
Hubble Space Telescope view of Abell 2744, a massive galaxy cluster
On the Frontier Monday, March 9, 2015
Gemini Observatory image of VV 166 galaxy group
Galaxies Galore Sunday, January 11, 2015
Simulation of the early universe
Tangled Web Saturday, May 10, 2014
HST image of thousands of galaxies
Galaxies Galore Thursday, April 17, 2014
Hubble image of a galaxy cluster and the deduced location of its dark matter
Dark Universe Monday, August 5, 2013
Hubble view of Coma Cluster of galaxies
Crowning Glory Friday, April 19, 2013
Optical and X-ray image of the galaxy cluster Abell 383
Brilliant Darkness Friday, March 16, 2012
New Heavyweight Champion Monday, February 6, 2012
Galactic Swirl Wednesday, December 14, 2011
NGC 4438 and NGC 4435, galaxies in Virgo
Beautiful Eyes Thursday, August 25, 2011
Ground-based image of the galaxy cluster Abell 2151, in Hercules
Galaxies Galore Friday, October 1, 2010
Galactic Beauty Wednesday, August 11, 2010
This giant cluster of galaxies and hot gas provides evidence of dark matter.
Cosmic Bullets Tuesday, July 20, 2010


Virgo Virgo is the second-largest constellation -- so...


©2015 The University of Texas McDonald Observatory