How do they form? It’s all about the infall. You get enough gas and dust crammed in there fast enough, you get an absolutely massive star. The problem is that there are believed to be theoretical limits on how much mass you can squash in there, before the stuff at the bottom of the pile ignites and blows off the rest.
There’s quite a bit we don’t know about stellar formation.
Because of the time scales involved, it's a bit like trying to work out the life cycle of trees by taking a single snapshot of a forest. You can do it, but it's tricky.
Yeah, and considering we have a star right next to this planet, keeping us alive, you'd think we'd know a lot more about their formations. I find stars to be some of the most bizarre objects we humans can see. Few other things can match their size, age and enormous, almost supernatural power.