Astronomers watch a massive star collapse into a black hole without a supernova

Astronomers watch a massive star collapse into a black hole without a supernova A massive star in Andromeda just vanished — and left behind a newborn black hole glowing in the dark. - Date: - February 14, 2026 - Source: - Simons Foundation - Summary: - A massive star 2.5 million light-years away simply vanished — and astronomers now know why. Instead of exploding in a supernova, it quietly collapsed into a black hole, shedding its outer layers in a slow-motion cosmic fade-out. The leftover...