Supernovae not what they used to be

Exploding stars that light the way for research on dark energy aren’t as powerful or bright, on average, as they once were, says a new study by University of Toronto astronomers.

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<p><a href="http://www.physorg.com/news110810006.html">Supernovae not what they used to be</a></p> <p>Exploding stars that light the way for research on dark energy aren’t as powerful or bright, on average, as they once were, says a new study by University of Toronto astronomers. </p>