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File:The Gravitational Lens G2237 + 0305 (opo9020a).jpg

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The European Space Agency's Faint Object Camera on board NASA/ESA Hubble Space Telescope has provided astronomers with the most detailed image ever taken of the gravitational lens G2237 + 0305, sometimes referred to as the "Einstein Cross".

Summary

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Description
English: The European Space Agency's Faint Object Camera on board NASA/ESA Hubble Space Telescope has provided astronomers with the most detailed image ever taken of the gravitational lens G2237 + 0305, sometimes referred to as the "Einstein Cross". The photograph shows four images of a very distant quasar which has been multiple-imaged by a relatively nearby galaxy acting as a gravitational lens. The angular separation between the upper and lower images is 1.6 arc seconds.The quasar seen here is at a distance of approximately 8 billion light years, whereas the galaxy at a distance of 400 million light years is 20 times closer. The light from the quasar is bent in its path by the gravitational field of the galaxy. This bending has produced the four bright outer images seen in the photograph. The bright central region of the galaxy is seen as the diffuse central object.
Date 13 September 1990 (upload date)
Source The Gravitational Lens G2237 + 0305
Author NASA & ESA
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Licensing

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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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