File:NASA-ESA Hubble Space Telescope colour images of gravitational lenses (opo9203b).jpg

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NASA/ESA Hubble Space Telescope (HST) colour views of the distant quasar 1208+101 indicate that its image has been split in two by a gravitational lensing.

Summary

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Description
English: NASA/ESA Hubble Space Telescope (HST) colour views of the distant quasar 1208+101 indicate that its image has been split in two by a gravitational lensing. The quasar was first observed with HST's Wide Field/Planetary Camera in July 1991 as part of the Snapshot Survey for gravitational lenses. The Snapshot Survey consists of short (about four minute) exposures of several hundred very bright, very distant quasars with the Wide Field/Planetary Camera. Current theories of gravitational lensing suggest that several of these quasars should be seen as multiple images with separations smaller than can be seen in ground-based observations.Gravitational lensing is a phenomenon by which the pull of a massive object, such as a galaxy, can bend light from another, more distant, object as the light passes near or through it, focusing the light in multiple identical images. The high spatial resolution capability of HST allows searches for multiple images at separations of only 0.2 arc seconds; this is about five times smaller than can be done with ground-based instrumentation.
Date 13 January 1992 (upload date)
Source NASA/ESA Hubble Space Telescope colour images of gravitational lenses
Author Professor John Bahcall, Dr. Donald Schneider, Dr. Dan Mayoz, all of the Institute for Advanced Study
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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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