This is a stars life cycle. Kinda just like a human life cycle. Actually, just life a human life cycle!
When a Protostar is formed, that is the very first step of a star. A protostar is a large mass that forms by contraction out of gas of a giant molecular cloud in the interstellar medium. The protostellar phase is an early stage in the process of a stars formation.
Protostar
Once achieving nuclear fusion, stars radiate (shine) energy into space. The star slowly contracts over billions of years to compensate for the heat and light energy lost. As this slow contraction continues, the star’s temperature, density, and pressure at the core continue to increase. The temperature at the center of the star slowly rises over time because the star radiates away energy, but it is also slowly contracting. This battle between gravity pulling in and gas pressure pushing out will go on over the entire life span of the stars.
 |
| Nuclear Fusion In Protostars |
