Stars are born in regions of high-density interstellar clouds. Two phases exist. Mostly heavier elements such as Fe and silicates. Cool and Big. Two processes acting to change its shape.
Gravity tries to force contraction of the cloud.
Stars are born from collapse of large cloud, with many smaller collapses or fragmentations taking place during general collapses. Cloud begins to collapse, Density, and Temp. Core heats up to 1000K to 2000K Cloud material gets dense. This Protostar is a warm core with surrounding IR Cocoon. Object Several thousand solar radii.