KnowraRosette NebulaLinked fromLinked fromThe 3 pages that link to Rosette Nebula, each with the reason it gives.All 3Broader topic 2Compared with 1H II regionBroader topic: Its ring-like cavity illustrates expansion of an H II region into a molecular cloud.Emission nebulaBroader topic: Its central cluster has excavated and ionized the surrounding gas into a clear cavity and shell.