I'm researching the creation of galaxies and I've came across these two terms. In my research on theory says that the fluctuations in density of space trapped gas and dust, which formed protogalactic galaxies that then forms a galactic disk. The other one says that the clumping of dark matter...
Im a grade 12 student and I just started reading black holes aint so black in the brief history of time. However, I'm having a hard time distinguishing a difference between these two particles. What is a difference?
thanks!