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spacetelescope.org
Official ESA Hubble site - Photo 59 Collection, NASA, ESA, the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University), April 24, 2008, archived from the original on July 4, 2008, retrieved 2008-07-18
web.archive.org
Official ESA Hubble site - Photo 59 Collection, NASA, ESA, the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University), April 24, 2008, archived from the original on July 4, 2008, retrieved 2008-07-18