Wolf-Rayet nebula
Encyclopedia
A Wolf–Rayet nebula is a nebula
which surrounds a Wolf–Rayet star. A subtype of a WR-nebula is the Pinwheel nebula
.
There are different types of WR-nebula, based on their formation mechanism:
Examples of this type of nebula include NGC 6888 and NGC 3199.
Nebula
A nebula is an interstellar cloud of dust, hydrogen gas, helium gas and other ionized gases...
which surrounds a Wolf–Rayet star. A subtype of a WR-nebula is the Pinwheel nebula
Pinwheel nebula
-Spiral galaxies:The term 'Pinwheel nebula' is an antiquated misnomer used by observers before Edwin Hubble realized that these spiral shaped nebulae were actually 'island universes'.-Wolf-Rayet nebulae:...
.
There are different types of WR-nebula, based on their formation mechanism:
- HII regions
- ejecta-type nebulae
- wind-blown bubbles
- neutral hydrogen voids and shells (may be associated with ionized gas)
Examples of this type of nebula include NGC 6888 and NGC 3199.