SOLAR SYSTEM

Detailed explanation-1: -As the cloud collapses, it begins to spin and by the time a protostar is formed, the cloud flattens and there is a protostellar disk spinning around the protostar.

Detailed explanation-2: -If the protostar can reach a temperature of 10 million degrees kelvin, the hydrogen fusion process will start and it will become an actual star.

Detailed explanation-3: -As a cloud core collapses, much of its mass falls to the center to become a protostar, while material flowing inward with a substantial transverse velocity forms a disk orbiting around the protostar.

Detailed explanation-4: -By the time a collapsing gas cloud has become a protostar, its core has reached a temperature of several million kelvin. At this temperature, the hydrogen in the core will be a plasma, a “soup” of hydrogen ions and electrons moving around at very high speed.