A Star Vanished And Was Mysteriously Replaced by a Black Hole

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Massive stars about eight times more massive than the Sun explode as supernovae at the end of their lives. The explosions, which leave behind a

The outward force from its fusion can no longer counteract the star's powerful gravity, and the star collapses in on itself. The result is a supernova explosion, a calamitous event that destroys the star and leaves behind a black hole or a neutron star. Scientists are interested in supernovae because they are responsible for creating many of the heavy elements, and their shock waves can trigger star formation. They also create cosmic rays that can reach Earth.Artist's impression of a Type II supernova explosion. These supernovae explode when a massive star nears the end of its life and leaves behind either a black hole or a neutron star. But sometimes, the supernova fails to explode and collapses directly into a black hole. in 2014.

Their observations suggest that the star is surrounded by a recently ejected dust shell, in accordance with a supernova explosion, but there's no evidence of an optical outburst. Neutrinos get their name from the fact that they're electrically neutral and seldom interact with regular matter. Every second, about 400 billion neutrinos from our Sun pass right through every person on Earth.

This image illustrates how the neutrino shock wave can stall, leading to a black hole without a supernova explosion. A shows the initial shock wave with cyan lines representing neutrinos being emitted and the red circle representing the shock wave propagating outward. B shows the neutrino shock stalling, with white arrows representing infalling matter. The outer layers fall inward, and the neutrino heating isn't powerful enough to revive the shock.

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