KnowraPinwheel GalaxyLinked fromLinked fromThe 7 pages that link to Pinwheel Galaxy, each with the reason it gives.All 7Broader topic 3Compared with 4Ursa MajorBroader topic: Its location makes the constellation a destination for galaxy observation.Pierre MéchainBroader topic: Méchain discovered this galaxy in 1781 and reported it to Messier.Unbarred spiral galaxyBroader topic: Its extended spiral pattern offers a well-known example of an unbarred disk.