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Press Room 2013 2012 2011 2010 2009 2008 2007 2006 2005 Archive All News News Conferences Public Affairs Office David Aguilar (617) 495-7462 Christine Pulliam (617) 495-7463 pubaffairs@cfa	Press Release Release No.: 2011-04For Release: Thursday, January 13, 2011 The Best Way to Measure Dark Energy Just Got Better A Type Ia supernova occurs when a white dwarf accretes material from a companion star until it exceeds the Chandrasekhar limit and explodes. By studying these exploding stars, astronomers can measure dark energy and the expansion of the universe. CfA scientists have found a way to correct for small variations in the appearance of these supernovae, so that they become even better standard candles. The key is to sort the supernovae based on their color. Credit: NASA/CXC/M. Weiss Low Resolution Image (jpg) Back to Press Release
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