Cosmologists cant explain what they observe with their normal laws of physics so they just invented some dark stuff. Therefore dark science like fake news and anonymous sources seems to be the way popular mainstream operates nowadays
However, know laws of physics can explain the movement of stars , its called the science called plasma electromagnets ,
Stars were formed from =clouds of gas and dust which were already in motion, swirling about the galaxy, gravitationally.
Electromagnetic fields and gravity are a lot closer linked than people realize. Mainstream Scientists are still baffeled why the corona of the sun is far hotter than the surface. But according to ecetroplasma dynamics it explainable.