Black holes are regions in space with gravity so intense that nothing, not even light, can escape them. They form from the collapse of massive stars, creating a singularity at their center and an event horizon, which is the boundary beyond which escape is impossible. Black holes are classified into three types based on mass: stellar, supermassive, and potentially intermediate-mass. Their effects are observed through interactions with nearby matter, like X-ray emissions.

What are black holes?

What Are Black Holes?

Types - NASA Science

Black hole | Definition, Formation, Types, Pictures, & Facts | Britannica

a blue and orange circle with a black background

What are black holes?

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