Supernovae: They don't make 'em like they used to


[image title=”supernova” size=”thumbnail” id=”141″ align=”right” linkto=”” ]Back in the day, the universe could really belt out the supernovae — but no more. A new survey of monster stellar detonations shows that the more distant and ancient the explosions are, the greater their inherent brightness. This discovery has important implications for measuring the rate at which the universe is expanding, and therefore that weird space-making cosmological mystery called dark energy.

The ongoing Supernovae Legacy Survey, which led to the discovery, involves comparing the supernovae of nearby galaxies to those which can be spotted igniting up to nine billion light-years away.

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