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White dwarf supernovae are discovered in Virgo Cluster galaxy and in sky area “anonymous”
Light from two massive stars that exploded hundreds of millions of years ago recently reached Earth, and each event was identified as a supernova by SMU researchers.
A supernova discovered Feb. 6 exploded about 450 million years ago, and a second supernova discovered Nov. 20 exploded about 230 million years ago. Continue reading