Monday, March 18, 2013
Famous supernova reveals clues about crucial cosmic distance markers
Famous supernova reveals clues about crucial cosmic distance markers: 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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