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grand design spiral galaxy

(spiral galaxy with two just two arms that are well-defined)

A grand design spiral galaxy is a spiral galaxy with a particular spiral structure: with two spiral arms that are well-defined, making it a very symmetric spiral. Examples:


(galaxy type,spiral)
http://en.wikipedia.org/wiki/Grand_design_spiral_galaxy

Referenced by:
EMPIRE Survey
LINER
Messier 100 (M100)
Pinwheel Galaxy (M101)
Whirlpool Galaxy (M51a)
Messier 74 (M74)

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