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A star in the Andromeda galaxy vanished, then collapsed straight into a black hole on camera

A massive star in the Andromeda galaxy brightened in infrared light starting around 2014, then faded from optical view and ...
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Neutrino flavor flips could be key to triggering supernovae

Despite being so elusive, neutrinos are produced in abundance in some of the most violent events in the universe. One of their strangest properties is that they can spontaneously switch between three ...