a nebular creates stars as it caves in by its own gravity!
mostly hydrogen and helium
No, it was formed as part of the collapse of the Nebular which formed the Sun.
All planets are formed form the remains of the solar nebular.
Nebular model
hydrogen and helium
hydrogen and helium
hydrogen and helium
hydrogen and helium
hydrogen and helium
Mostly of hydrogen ... over 95 %.
in a nebular
The answer is Nebular Theory