Why do supermassive black holes have a much lower density then smaller ones?
52339
How can super massive black holes have a lower density than water?
85078
Why must a singularity form inside a black hole?
145211
Why is black hole entropy not an extensive quantity?
92997
If dark matter only interacts with gravity, why doesn't it all clump together in a single point?
110962
What would the effect be of a small black hole colliding with the earth?
150895
Can micro black holes form in the Sun?
61095
When does a singularity start to exist during a black hole formation?
113347
Are "typical" black holes rotating or static?
59068
What happens to atoms inside a black hole?
116137
Particle speed and density
15980
Hydrostatic pressure - doesn't density vary with depth?
58224
BH singularity? Infinite density
31618
Why do objects appear smaller when farther away?
84229
Why the galaxies form 2D planes (or spiral-like) instead of 3D balls (or spherical-like)?
39675
Do black holes have a moment of inertia?
135375
A Hollow Black Hole
45034
Does black hole formation contradict the Pauli exclusion principle?