Originally Posted by
Skeptic Ginger
Are neutron stars the same density as black holes? (I know the BH has more mass unless it evaporates or whatever they do.)
Black holes = infinitely dense?
If you define density for a black hole as mass divided by volume enclosed by the event horizon then black holes have finite density. And they can come in a very wide variety of densities, including as low density as hydrogen gas here on Earth if they are very large black holes.
Both black holes and neutron stars come in a variety of masses. Though neutron stars are subject to more constraints that lead to a lesser range of mass and densities.