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Hubble Extreme Deep Field
From Wikipedia, the free encyclopedia

The Hubble eXtreme Deep Field (XDF) is an image of a small part of space in the center of the Hubble Ultra Deep Field within the constellation Fornax, showing the deepest optical view in space.

http://en.wikipedia.org/wiki/Hubble_Extreme_Deep_Field

For more on the XDF, see the XDFProject website at http://xdf.ucolick.org/xdf.html