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gimleychuckles t1_iv3yxmm wrote

Reply to comment by jmb2k6 in Closest known black hole to Earth spotted by astronomers by lunarmoonr

The singularity is a dimensionless object. It is a point in space. We aren't certain what exactly that point looks like, but we do know it's a point. It has no length, width or height.

So to describe a black hole's size, is to refer to the event horizon, a boundary which is dictated by the black holes mass and spin.

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starmartyr t1_iv43286 wrote

The singularity might not actually exist. It is theorized under relativity, but it doesn't really work well with quantum theory. Unfortunately, we do not yet have a theory of quantum gravity so the singularity is the best model for the interior of a black hole that we have.

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