KnowraGrand-design spiral galaxyLinked fromLinked fromThe 8 pages that link to Grand-design spiral galaxy, each with the reason it gives.All 8Broader topic 5Narrower topic 1Compared with 2Spiral galaxyBroader topic: Its sharply defined arms contrast with the fragmented patterns of many spiral galaxies.Density wave theoryBroader topic: Its orderly arms resemble the large-scale patterns the theory seeks to explain.Spiral armBroader topic: Its arms form a coherent pattern unlike the fragmented arms of many spirals.Whirlpool GalaxyBroader topic: Its two conspicuous arms distinguish the Whirlpool from flocculent spirals with fragmented patterns.Messier 81Broader topic: M81 is a classic example, with arms that remain distinct across much of its disk.