This is something I've been thinking about for a while. It may be totally off the wall, but the idea nevertheless makes me wonder and to me at least,
makes a great deal of sense.
It is believed cosmic inflation (the expansion of the universe at ever increasing speeds) is caused by dark-energy which we know very little about.
Black holes are inescapable regions of space, caused by the core collapse of supermassive stars. They have been shown to merge with other black holes.
It is believed all galaxies have a supermassive black hole at their center, and that galaxy mergers happen in the sense that the supermassive black
hole in the center of one will merge with the supermassive black hole in the center of the other galaxy.
At this time, it is believed the universe will continue to expand until all the matter in the universe is extremely isolated. Again, this hinges upon
the notion of dark energy counter-acting against the force of gravity, causing the universe to continually expand.
The idea I've been toying with is, what if the dark energy in the universe effectively "runs out?" Think of it like an average star running out of
its source of energy, hydrogen fuel which then triggers instability.
If in trillions upon trillions of years this supposed dark energy is used up, wouldn't all the black holes and galaxies slowly begin to merge
together? Over an enormous amount of time, what if everything coalesces together into a singularity? What does this sound like? The big bang, and
beginning of our universe.
What if eventually, all matter compacts into another singularity, triggering another "big bang" or theorized "white hole" and re-creates the
universe all over again, somehow creating dark energy once more and triggering another chapter in our universe?
I know this is somewhat convoluted, and I certainly didn't explain it all that eloquently, but this is something I've been toying with making sense
of in my mind, and I'm just sharing my thoughts with everyone here.
Also, I'm not sure if this exists in any form as theory; if it has, I don't recall reading it would love to hear about it.
If this is totally off the wall, feel free to tell me.