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Computing the shape of gravitational waves to come
Observations of remnants of supernova 1987A by camera and spectrograph have furnished new clues to the life of a star whose catastrophic explosion astronomers witnessed four years ago.
A sprinkling of distant star clusters, throwing tantrums in stellar nurseries, polar winds and excretion disks, new echoes of supernova 1987A, and low-budget stellar spectroscopy.
Ringing up another light echo, and the Milky Way's third population.
Missing by more than a mile, life at the end of the line, and a supernova test of special relativity.
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