The Origin and Its Meaning

Black Holes

A "black hole" is a small region at the center of a galaxy, the region exhibiting huge gravitational attraction.

 The term "black" is because not even light can escape the gravitation. The black hole allows nothing out; it is literally black.

 The term "hole" is because it "sucks" the surrounding matter into it as if it were a bottomless pit, a hole.

Such a black hole should eventually suck everything into it, as follows. Because gravitation is proportional to mass:

 As the hole sucks in more mass its gravitational attraction becomes even stronger.

 And, as its gravitational attraction becomes even stronger it can suck mass in even more strongly.

But, black holes appear to affect only the region near them. Most of a black hole's galaxy acts as if there were no black hole, merely an ordinary gravitating mass, there.

This behavior is readily explained because ...

... The Origin and Its Meaning

does for physics what Euclid did for geometry -- it supersedes mere empirical conclusions with derivation of all of physics.

20th Century physic's relativity shows that the linear Newton's 2nd Law of Motion, F = m a, becomes non-linear at large speeds.

Similarly the derivation of gravitation in The Origin and Its Meaning shows that gravitation becomes non-linear at large accelerations.

 In strong gravitational fields the strength of the action increases hyperbolically as the field increases.

 Black holes exhibit such strong gravitational fields near the black hole. Farther out the field is much less and the gravitation is normal.