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Revision as of 04:19, 14 December 2024 by Aacounthingy (talk | contribs)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)SDSS J1038+4849 is a galaxy cluster in the constellation Ursa Major, famous for its appearance as a "smiley face." This is caused by a phenomenon known as gravitational lensing.
File:HST-Smiling-GalaxyClusterSDSS-J1038+4849-20150210.jpg