Prove me wrong, I dare you!
It’s called a galaxy
Okay, so what if galaxies are synonymous to atoms in that they are the building blocks of something greater?
insert something here about protons, neutrons, electrons, quarks etc. being comparable to solar systems and planets.
Galaxies form galactic groups and clusters. Clusters can form into super clusters. Beyond that, you’re looking at the universe itself as the next large collection of stuff.
The burden of proof lies with the one making the claim. But cool thought though!
They are. Solar systems make up galaxies, which make up clusters, which make up super clusters, which make up galaxy filaments the largest known structures in the universe. Each one of these recursions make the one before it seem infinitesimally small.
So they must all form something… right? What is that something?
The universe… which might actually be the inside of a giant black hole. Turns out the observable universe contains more than enough mass to create a black hole the size of the observable universe. This would also make sense because the Big Bang started as a singularity of infinite density, and what’s at the center of a black hole? A singularity of infinite density. This also would jive with the recent developments around the holographic universe theory because black holes have been shown to store all contained information holographically (basically all of the information is encoded on the 2d surface of the event horizon).
The theory that our universe is inside a black hole isn’t new, nor is it accepted as fact by the whole scientific community, but it is a genuine possibility. Then begs the question, is there another universe outside this black hole, and are there universes inside the black holes in our universe? It might be an infinite self contained loop of infinite universes.
Please note that all of this is way oversimplified.