KnowraCircumstellar mediumLinked fromLinked fromThe 7 pages that link to Circumstellar medium, each with the reason it gives.All 7Related 5Narrower topic 2SN 1987ARelated: The expanding ejecta interact with gas lost by the progenitor before it exploded.Red supergiantRelated: Ejected red-supergiant material can surround the star before it explodes.Luminous blue variableRelated: Its structure records past eruptions and influences the appearance of later explosions.Kepler's SupernovaRelated: The remnant’s interaction with dense surrounding material helps explain its unusual brightness and structure.LBV 1806−20Related: Material expelled by the star may preserve evidence of its past eruptions and wind.