Hints: galaxy dynamics hydrogen ionized
But we are just one in 125 billion galaxies of different shapes and sizes spinning through space. Yet scientists haven't been able to explain how a single one of these galaxies was created.
Galaxy formation is a very complicated process, we think, it involves gravity and it involves large balls of gas colliding, it involves the dynamics of stars and it involves the chemistry of the gas coming together.
All we know is that when the universe was young, there were no stars or planets, just great swirling clouds of hydrogen gas. The mystery is how each of these clouds turned into the complex galaxies of stars we see today.
We just don't know how they do it, how galaxies formed out of the, the ionized hot gas that's filled the universe is still physics that we do not really understand yet.