File:A Cluster of Galaxies Four Billion Light-years Away (1992-28-83).tiff

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Captions

Captions

This is a NASA 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).

Summary[edit]

Description
English: This is a NASA 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. The HST picture confirms that billions of years ago, clusters of galaxies contained not only the types of galaxies dominating their descendant clusters today, but also several times as many spiral galaxies. These spiral galaxies have since disappeared through possibly a variety of processes: merger1 disruption, and fading. The Hubble images provide the first unambiguous evidence for the influence of environment on the form of a galaxy. The image was taken with HST's Wide Field/Planetary Camera in Wide Field Camera mode, and required a six-hour exposure.
Date 1 December 1992 (upload date)
Source A Cluster of Galaxies Four Billion Light-years Away
Author Photo Credit: Alan Dressier, Carnegie Institution, and NASA Co-investigators: Augustus Oemler (Yale Universfty), James E. Gunn (Princeton University), Harvey Butcher (the Netherlands Foundation for Research in Astronomy).
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Licensing[edit]

Public domain This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.

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current22:23, 11 February 2024Thumbnail for version as of 22:23, 11 February 20242,367 × 2,358 (3.6 MB)OptimusPrimeBot (talk | contribs)#Spacemedia - Upload of https://stsci-opo.org/STScI-01EVVN0XSKPVP95GJ2Y33JDCDK.tif via Commons:Spacemedia

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