Scientists Explain How Vanishing 5-Solar-Mass Star Turns Into Black Hole

Astronomers captured the clearest evidence of a massive star collapsing directly into a black hole without exploding as a supernova. The discovery centered on a star, M31-2014-DS1, in the neighboring Andromeda Galaxy. Instead of ending its life in a bright explosion, the star simply faded away. Scientists now say it collapsed inward, forming a black...