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Wikipedia definition
1. Hubble Ultra-Deep FieldThe Hubble Ultra-Deep Field (HUDF) is an image of a small region of space in the constellation Fornax, composited from Hubble Space Telescope data accumulated over a period from September 24, 2003, through to January 16, 2004. It is the deepest image of the universe ever taken, looking back approximately 13 billion years (between 400 and 800 million years after the Big Bang), and it will be used to search for galaxies that existed at that time.
Read “Hubble Ultra-Deep Field” on English Wikipedia
Read “ハッブル・ウルトラ・ディープ・フィールド” on Japanese Wikipedia
Read “Hubble Ultra-Deep Field” on DBpedia

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