KnowraSpiral armLinked fromLinked fromThe 11 pages that link to Spiral arm, each with the reason it gives.All 11Broader topic 6Related 2Narrower topic 2Compared with 1Unbarred spiral galaxyRelated: Spiral arms define the visible pattern of these galaxies.Stochastic self-propagating star formation modelRelated: Propagating star formation can contribute to patterns of young stars within a disk.