Protostars
Protostars is the second stage of star creation
A star will live the majority of its live in the main sequence phase. This is where nuclear fusion of hydrogen into helium is happening in its core, and the light pressure of this energy balances out the gravitational collapse of the star. Before a star gets into the main sequence phase, though, it spends some time as a protostar – a baby star.
At this point the temperature eventually reaches 15,000,000 degrees Celsius.
The clouds begin to glow brightly.
At this stage, it contracts a little and becomes stable and is called a main sequence star.