A Star Disappeared in Andromeda, Replaced by a Black Hole

This Illustration shows a failed supernova turning directly into a black hole without an explosion. Credit: NASA/ESA/P. Jeffries (STScI)

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 black hole or a neutron star, are so energetic they can outshine their host galaxies for months. However, astronomers appear to have spotted a massive star that skipped the explosion and turned directly into a black hole.

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