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Famous Supernova Reveals Clues About Crucial Cosmic Distance Markers

March 21, 2013

Data From NASA's Chandra X-Ray Observatory Adds To Scientists' Understanding A new study using data from NASA's Chandra X-ray Observatory points to the origin of a famous supernova. This supernova, discovered in 1604 by Johannes Kepler, belongs to an important class of objects that are used to measure the rate of expansion of the universe.

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