I see, hear, and read about black holes and their consumption power often. They grow as they consume. Eventually, as they keep growing and consuming, wouldn’t they combine and continue the process until they become so large as to devour everything in existence?
In: Physics
On extreme time scales like quintillions of years there are two main things that will happen to bodies. They either remain gravitationally bounded to a galaxy or a group of galaxies or flung out by some other object.
In the latter case these objects will inevitably end up being on their own as the universe is dominated by dark energy and so unbounded bodies end up being separated and continue in their practically own universe.
For gravitationally bound system orbits will decay as the accelerated masses radiate like accelerated charges but in our case they radiate gravitational waves. This very slowly kills their kinetic energy and they end up spiralling into the center most likely a black hole.
So you’ll end up with black holes, rogue planets, other stellar corpses separated by ever increasing distances.
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