EntityQ618273· pop 27· linked from 340 articlesCassiopeia ASign in to savesupernova remnant in the constellation CassiopeiaConnectionscosmic dustEntityChandra X-ray ObservatoryEntitySN 1604EntityhypergiantEntityred supergiantEntityexotic starEntityType II supernovaEntityType Iax supernovaEntityEarthConceptSolar SystemEntitystarEntityVenusEntityironEntityMilky WayEntitychemical elementEntitygalaxyEntityphosphorusEntitylight-yearEntityconstellationEntityUniversity of CambridgeEntityCategories1940s in outer space1947 in science3C objectsAstronomical objects discovered in 1947Cassiopeia (constellation)Flamsteed objectsMilky WaySupernova remnants