Core of Galaxy NGC 4261: A Hubble Space Telescope (HST) and ground-based view of the core of galaxy NGC 4261.

Name: NGC 4261
Type: Local Universe : Galaxy : Type : EllipticalLocal Universe : Galaxy : Component : Central Black Hole
Category: Galaxies
Distance: 100 million light years
Release date: 19 November 1992, 06:00
Credit: N/A

HST photographs a cluster of galaxies four billion light-years away: This is a NASA/ESA Hubble Space Telescope image of a portion of a remote cluster of galaxies (CL 0939+4713) that existed when the universe was two-thirds of its present age (redshift z = 0.4). Hubble's high resolution allows astronomers to study, for the first time, the shapes of galaxies which existed long ago. The Space Telescope pictures are sharp enough to distinguish between various forms of spiral galaxies, as well as galaxies in collision, some tearing material from each other, some merging into single systems.

Name: CL 0939+4713
Type: Early Universe : Galaxy : Grouping : Cluster
Category: CosmologyGalaxies
Constellation: Ursa Major
Distance: z=0.406 (redshift)
Release date: 1 December 1992, 06:00
Credit: Alan Dressier, Carnegie Institution, and NASA/ESA Co-investigators: Augustus Oemler (Yale Universfty), James E. Gunn (Princeton University), Harvey Butcher (the Netherlands Foundation for Research in Astronomy).

The farthest cluster of galaxies ever seen?: This NASA/ESA Hubble Space Telescope image reveals one of the faintest and probably farthest clusters of galaxies ever seen. The cluster contains about 30 very faint objects which are unusually small and compact in appearance. (The larger objects are foreground galaxies located in a separate galaxy cluster four billion light-years away). These lumpy spots do not appear to resemble the elliptical and spiral galaxies of today. The objects might not be separate galaxies but rather sites of strong star formation embedded within primordial galaxies which are too faint to be seen in this HST exposure. The colours of these objects (measured with the Mount Palomar 200-inch telescope), place the cluster at a distance of at least seven billion light-years (redshift z > 1.)

Name: CL 0939+4713
Type: Early Universe : Galaxy : Grouping : Cluster
Category: CosmologyGalaxies
Constellation: Ursa Major
Distance: z=0.406 (redshift)
Release date: 1 December 1992, 06:00
Credit: Alan Dressier, Carnegie Institution, and NASA/ESA Co-Investigators:Augustus Oemler (Yale University), James E. Gunn (Princeton University), Harvey Butcher(the Netherlands Foundation for Research in Astronomy).

A "Hubble atlas" of ancient galaxies: Hubble Space Telescope's high resolution allows astronomers to classify galaxies in a cluster (CL 0939+4713) that existed four billion years ago, when the universe was two-thirds of its present age. The galaxies in this mosaic are arranged according to the well-established system developed by American astronomer Edwin Hubble in the 1920s. Despite the cluster's great distance of four billion light-years, the Space Telescope pictures are sharp enough to distinguish between various forms galaxies.

Name: CL 0939+4713
Type: Early Universe : Galaxy : Grouping : Cluster
Category: CosmologyGalaxies
Distance: z=0.406 (redshift)
Release date: 1 December 1992, 06:00
Credit: Alan Dressier, Carnegie Institution, and NASA/ESA Co-investigators:Augustus Oemler (Yale Urnversfty), James E. Gunn (Princeton Universfty), HarveyButcher (the Netherlands Foundation for Research in Astronomy).