Pinwheel nebula

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A pinwheel nebula is a nebulous region in the shape of a pinwheel.

Spiral galaxies[edit]

Main article: Spiral galaxy

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[edit]

Main article: Wolf-Rayet nebula

Some Wolf-Rayet stars are surrounded by pinwheel nebulae. These nebulae are formed from the dust that is spewed out of a binary star system. The stellar winds of the two stars collide and form two dust lanes that spiral outward with the rotation of the system.

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