Black Hole

A black hole is a region of spacetime where gravity is so strong that nothing, not even light, can escape. Most form when the core of a massive star collapses at the end of its life, compressing matter past a critical density. Every black hole is described by just three properties: mass, spin, and electric charge. Its boundary is the event horizon, and at its center general relativity predicts a singularity where the theory itself breaks down. The Event Horizon Telescope has now imaged the glowing ring of light around two of them, in the galaxy M87 and at the center of the Milky Way.

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