EntityQ25325311· pop 5· linked from 37 articlesCometary knotSign in to savesometimes called simply a "knot", a feature of planetary nebulaeConnectionsnebulaEntityplanetary nebulaEntitymolecular cloudEntityBok globuleEntityEarthConceptstarEntitySolar SystemEntityPlutoEntitycometEntityNASAConceptdigital object identifierEntityInternational Standard Serial NumberEntitywhite dwarfEntityångströmEntitysolar massEntityOrion NebulaEntitybibcodeEntityQ118398EntityRing NebulaEntitydark nebulaEntityCategoriesPlanetary nebulaeStellar astronomy