NASA / KEREN SHARON (TEL-AVIV UNIVERSITY) / ERAN OFEK (CALTECH) / LARS LINDBERG CHRISTENSEN / ESA / HUBBLE / SCIENCE PHOTO LIBRARY NASA / KEREN SHARON (TEL-AVIV UNIVERSITY) / ERAN OFEK (CALTECH) / LARS LINDBERG CHRISTENSEN / ESA / HUBBLE / SCIENCE PHOTO LIBRARY
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Zoom in to the distant galaxy cluster SDSS J1004+4112. This cluster shows several excellent examples of gravitational lensing. One more distant quasar has been lensed into five separate images. Several galaxies are also lensed into thin arcs and multiple images. Gravitational lensing is the bending of light by a powerful gravitational field, which can make the same object appear in several different places, as light travelling in different directions is bent back towards the viewer. The lensing cluster here is some seven billion light years from Earth, the quasar is around ten billion light years from Earth, and the most distant galaxy some 12 billion light years distant. Image taken by the Hubble Space Telescope.
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