Roughly 300 years ago, light from a supernova first appeared in Earth’s skies and formed the brilliant object Cassiopeia A. That blast emitted powerful shockwaves packed with clues about how a star ...
In 1987, astronomers observed an incredible star explosion in a galaxy not too far away in the Large Magellanic Cloud. Now, researchers suggest that the famed supernova, called 1987A, was created by a ...
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