Einstein Ring Around LRG 3-757
The blue "horseshoe" in this image is a distant galaxy that has been magnified and warped into a nearly complete ring by the strong gravitational pull of the massive foreground Luminous Red Galaxy (LRG 3-757) that it appears to surround. This is one of the best examples of an Einstein Ring. It also gives a view of the early Universe: the blue galaxy's redshift, a measure of how the wavelength of its light has been stretched by the expansion of the cosmos, is approximately This means we see it as it was about 3 billion years after the Big Bang. The Universe is now billion years old. This picture was created from images taken in visible and infrared light on Hubble's Wide Field Camera 3. The field of view is approximately arcminutes wide.
Size: 3773px × 3000px
Photo credit: © Photo Researchers / Alamy / Afripics
License: Licensed
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