a planetary nebula forms after a hsb o3iii
protostar or nebula
Emission nebula glow and reflection nebula reflect the light form other stars
If the nebula is gravitationally unstable, it collapsing & forming stars!
Dust and particles.
A nebula may condense and ignite to become a star, conversely a star may explode and form a nebula.
Planetary nebula is a misnomer because it's totally irrelevant to planets and it has something to do with stars. The short form is "nebula".
Stars form from the matter within nebula.
An explosion from outside the nebula
When a nebula is disturbed by an outside explosion, it may form an accretion disc.
The nebula forms into a protostar.
no, it formed from a nebula, then condensed
A nebula.