Three basic arm categories in the Elmergreen classification scheme: Grand Design; Multiarm (intermediate); Flocculent.
NGC 2997: example of a Grand Design spiral
NGC 5055: example of a flocculent spiral
Arm Classes |
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Three basic arm categories in the Elmergreen classification scheme: Grand Design; Multiarm (intermediate); Flocculent.
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NGC 2997: example of a Grand Design spiral |
NGC 5055: example of a flocculent spiral |