File:NASA-HS-2014-33-GravitationalLensing-IRC0218.jpg
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English: News Release Number: STScI-2014-33
July 31, 2014 10:00 AM (EDT) Hubble Shows Farthest Lensing Galaxy Yields Clues to Early Universe Gravitational Lensing by Galaxy in Cluster IRC 0218 http://hubblesite.org/newscenter/archive/releases/2014/33/image/a/ ABOUT THIS IMAGE: These Hubble Space Telescope images reveal the most distant cosmic lens yet found, a massive elliptical galaxy whose powerful gravity is magnifying the light from a faraway galaxy behind it. The giant elliptical is the red object in the enlarged view at left. Its red color comes from the light from older stars. The galaxy is seen as it appeared 9.6 billion years ago and is one of the brightest members in a distant cluster of galaxies, called IRC 0218. The background image shows the entire region surrounding the galaxy. In the enlarged view, the lighter-colored blobs at upper right and lower left are the distorted and magnified shapes of a more distant spiral galaxy behind the foreground elliptical. The giant elliptical is so massive that its enormous gravitational field deflects light passing through it, much as an optical lens bends light to form an image. This phenomenon, called gravitational lensing, magnifies, brightens, and distorts images from faraway objects that might otherwise be too faint to observe even with the largest telescopes. Astronomers needed spectroscopy to determine that the blobby features were two images of the same distant galaxy, located 10.7 billion light-years from Earth. In the enlarged view at right, astronomers have subtracted the image of the giant red elliptical to show the more distant spiral galaxy. The glow of young stars makes the galaxy appear blue. The white area at upper right is probably a region of star formation. The images were made by combining visible-light observations from the Advanced Camera for Surveys and near-infrared exposures from the Wide Field Camera 3. |
| Data | |
| Fonte | http://imgsrc.hubblesite.org/hu/db/images/hs-2014-33-a-print.jpg |
| Autore | NASA, ESA, K.-V. Tran (Texas A&M University), and K. Wong (Academia Sinica Institute of Astronomy & Astrophysics) |
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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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| attuale | 16:48, 1 ago 2014 | | 3 000 × 2 400 (1,43 MB) | Drbogdan | User created page with UploadWizard |
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