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Hubble Ultra Deep Field (HUDF)

Between September 2003 and January 2004, Hubble again went drilling for galaxies at the edge of the known universe. This time astronomers used the Near Infrared Camera and Multi-object Spectrometer and the recently added Advanced Camera for Surveys to take an even deeper core sample of the universe. The Hubble snapshots revealed nearly 10,000 galaxies of various distances, sizes, shapes, and colors. The smallest, reddest galaxies are nearly 13 billion light-years away, while the larger, brighter, well-defined spirals and ellipticals are relatively nearby — about 1 billion light-years away.