Astronomers traced a supernova’s chirping light to a newborn magnetar, offering rare evidence of relativity in a stellar explosion. The light did not fade the way it was supposed to. After blazing into view about a billion light-years from Earth, the supernova known as SN 2024afav settled into something stranger. Its brightness rose, peaked, and then began to dip in a series of r... [7800 chars]
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