Did astronomers just see a star blink out to become a black hole?
Scientists have seen something spectacular unfolding in Andromeda, our neighboring spiral galaxy, located some 2.5 million light-years away from Earth. The spectacular part is actually what they didn’t see: instead of exploding as a bright supernova, a massive star there seems to have simply vanished. This case of “now you see it, now you don’t”…
