KnowraO-type starLinked fromLinked fromThe 8 pages that link to O-type star, each with the reason it gives.All 8Broader topic 3Related 2Narrower topic 1Compared with 2Omega NebulaRelated: O-type stars can power the ionization and heating of the nebula's gas.Trapezium ClusterRelated: Massive hot stars in the cluster power the nebula’s ionization and illumination.