The Main Process of All Stars

The main process of all stars birth is called ‘Nuclear Fusion’ nuclear fusion happens in very large clouds on gas called nebula. When nuclear fusion starts in a nebula and reaches a temperature of over 10,000 degrees the star begins to form. The new baby star that as we know now is called a protostar can star its very long life on the universe, Read in details here 

Stars – How They Are Formed