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jmb2k6 t1_iv3xbc9 wrote

Reply to comment by [deleted] in Closest known black hole to Earth spotted by astronomers by lunarmoonr

Black holes have dimensions though right? The diameter of the event horizon would be dependent on the mass of the black hole

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gimleychuckles t1_iv3yxmm wrote

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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