![]() ![]() If a star has more than 3 solar masses, then as it collapses, on it’s way to neutron-star-density, it becomes a black hole (a black hole with more mass needs less density). If a star has less than about 3 times as much mass as our Sun, then when it gets to this density it stops, and then hangs out forever. When a star runs out of fuel and collapses, this is the densest that it can get. This density is also the approximate density of neutron stars (which are basically giant atomic nuclei). ![]() The density of an atomic nucleus, where essentially all of the matter of an atom is concentrated, is about the highest density attainable by matter: about 10 18 kg/m 3, or about a thousand, million, million times denser than water. ![]() Except for all the gravity.īut there are limits to how dense matter can get on its own. A black hole with the mass of the Earth would be so small you could lose it pretty easy. ![]()
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