The development of a star begins with gravitational instability inside of a molecular cloud, attributable to areas of better density—typically brought on by compression of clouds by radiation from significant stars, growing bubbles in the interstellar medium, the collision of different molecular clouds, or the collision of galaxies (as in https://mixedmartialarts59370.blogdiloz.com/35032820/new-step-by-step-map-for-star