Tag Archives: Supernova

Supernova leftovers point to a messy blowup

In what sounds like a cosmic episode of “CSI,” sleuthing astronomers have figured out what touched off a stellar explosion 545 million light-years away, based on evidence left behind at the scene of the crime. An international team of astronomers … Continue reading

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Number crunchers are on the trail of dark energy

Big data just might give astronomers a better grip on the answer to one of the biggest questions in physics: Exactly what’s behind the mysterious acceleration in the expansion rate of the universe, also known as dark energy? And that … Continue reading

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Supernovae spread radioactive fallout on Earth

Researchers say they’ve found evidence of supernova explosions that spewed radioactive fallout over Earth during the age when humanity’s ancestors were evolving into upright-walking, big-brained creatures. One of two studies published in the journal Nature identifies deposits of radioactive iron-60 in deep-sea cores extracted … Continue reading

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Hubble catches supernova’s ‘instant replay’

Astronomers traced one of the weirder twists in relativity to determine when they’d see an “instant replay” of a distant supernova, and now the Hubble Space Telescope has shown that their prediction was right. They say it marks the first time a supernova … Continue reading

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