Famous supernova reveals clues about crucial cosmic distance markers
Monday, March 18, 2013 - 12:30
in Astronomy & Space
(Phys.org) —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.