Question

star formation begins when?

Answer 1

Star formation begins when the denser parts of the cloud core collapse under their own weight/gravity. These cores typically have masses around 10 to the power 4. solar masses in the form of gas and dust. The cores are denser than the outer cloud, so they collapse first.

Answer 2

The star - forming process begins when the cloud becomes unstable and breaks up into fragments. Gravity pulls the material in a fragment into an ever-tighter clump, and the clump slowly forms a sphere as it shrinks. Now a prostostar,this star - to - be carries on shrinking , its core getting denser and hotter . Eventually the pressure and temperature are so high that nuclear reaction begin, and star starts to shine.

HOPE SO IT WILL HELP U..........