Molecular Cloud Collapse and Star Formation | SpaceSim

[@jonathanbaincosmologyvideo3868]

Nice sim in itself. But... It starts virtually formed already. All particles already have perfectly symmetrical angular momentum around the center of gravity. So where does the uniform SPIN come from? The 'ice-skater effect' only describes conservation of angular momentum, not how that spin got there... btw

[@jonathanbaincosmologyvideo3868]

The other issue almost nobody addresses is that almost all stars exist as a binary pair, which no standard model can account for. This is true both from a gravity structure perspective, and from the star formation perspective. Third body interactions destroy such neat gravity structures 99.9% of the time.

[@physics_hacker]

I've told you before. These aren't the whole cloud, and are usually /never/ meant to be the whole cloud. It's about a ~1 AU section of a hundreds-of-parsecs-across cloud forming stars that has already done a lot of collapsing to get to the initial state. The spin comes from an area much bigger than this collapsing down to this size, and the random motion of an area even bigger than that original causes these small sections to have rather "uniform" spin to them. The full cloud doesn't interest me because the stars that would form from the whole cloud would only be made of only a few particles, I have tried and that's what I get. They do form binaries, do form with the spin you seem to think is just magic, but you don't get any fusion or interesting internal structure when the hundreds, thousands of stars that form are stars made of so few particles, so I usually don't bother. I wish I had a supercomputer that could run billions of particles to a simulation so that I could run at 1/10 this level of detail but for a whole cloud, but I don't, so I can't. I work with what I have so I do simulations like this.

[@sam_xd6574]

@@physics_hacker This person has dementia or something since he ask this almost in all of your recent videos you respond it and yet they ask it again

[@physics_hacker]

@@sam_xd6574 Yeah, I don't really get it

[@THE_LEGENDARY_M-gc2ed]

It's giving me a seizure from the colors

[@physics_hacker]

Sorry :-( The colors are to make things more clear