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Experts Baffled After a Star Vanished Strangely and Was Replaced by a Black Hole, 20 Times Greater in Mass
The subject in focus here is a hydrogen-depleted supergiant star in the Andromeda galaxy (M31), which produced a black hole without collapsing. Findings regarding the star and the unique ...
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Star's disappearance in Andromeda marks the birth of a black hole
The explosions, which leave behind a black hole or a neutron star ... hydrogen-depleted supergiant star in the Andromeda galaxy (M31) failed to detonate as a supernova. The research, posted ...
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How big is the largest black hole in the universe?
Now that may sound big, but Sagittarius A* is small compared to other supermassive black holes. Take the one at the center of our neighbor the Andromeda galaxy, which has a diameter of 516 million ...