Gravity is way too weak a force to hold something as massive as a galaxy together.

Well it obviously does. If not gravity, then what ?

Lots of things go faster than 186,000 miles per second.

OK, so name just one.

But when something goes that fast it exits the universe--that is why it cannot be observed.

What are you talking about ?

Your problem is that you are trying to talk according to the system. The system does not function. It never did.

I saw you mention the "system" in an earlier post. What system ? What
are you talking about ?