Keck Observatory supernova
Last September, University of California at Berkeley astronomers observed the largest and brightest supernova on record. SN 2006gy wasn't your typical exploding star, which brightens and dims in a matter of weeks. It took 70 days to reach full brightness and stayed brighter than any previously observed supernova for more than three months. Nearly 240 million light-years away, the supernova still outshines its host galaxy.
The ground-based observations were made at the University of California's Lick Observatory in California and the W. M. Keck Observatory in Hawaii.
September 13, 2007 12:50 PM PDT
Photo by: UC Berkeley/Lick Observatory
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