Giant gravitational arc
Seeing is believing, except when you don't believe what you see. Astronomers using NASA's Hubble Space Telescope have found a puzzling arc of light behind an extremely massive cluster of galaxies residing 10 billion light-years away. The galactic grouping, discovered by NASA's Spitzer Space Telescope, was observed when the universe was roughly a quarter of its current age of 13.7 billion years.
The giant arc is the stretched shape of a more distant galaxy whose light is distorted by the monster cluster's powerful gravity, an effect called gravitational lensing. The trouble is, the arc shouldn't exist.
NASA, ESA/Hubble, and A. Gonzalez (University of Florida, Gainesville, USA), A. Stanford (University of California, Davis and Lawrence Livermore National Laboratory, USA) and M. Brodwin (University of Missouri-Kansas City and Harvard-Smithsonian Center for Astrophysics, USA).
About the Image
|Release date:||27 June 2012, 13:50|
|Size:||450 x 450 px|
About the Object
|Type:||• X - Cosmology Images/Videos|