After arriving in England, when Chandrashekhar showed his results to Arthur Eddington, the astronomer couldn't believe that a star could become infinitely dense.
A singularity may be indefinitely dense, meaning all its mass is concentrated into a single point in space, with no surface or volume, or something completely different.
It doesn't seem to make any sense that you can have a defined space with a finite area, like Great Britain be surrounded by an infinitely long perimeter.
It's hard to imagine everything in the whole cosmos — every star, nebula, galaxy; every atom, electron, and proton — all squeezed together into one infinitely dense blob.
The Anatomy of a Black Hole At the heart of every black hole lies the singularity, a point of infinite density where our current understanding of physics breaks down.
Instead of an infinitely dense singularity, it is therefore possible that black holes contain a well of such energy, the presence of which would account for the observed mass discrepancy.