EntityQ1545114· pop 20· linked from 170 articlesSN 1181Sign in to savesupernova within Cassiopeia, observed in 1181ConnectionsThe Astrophysical JournalEntityAstronomy and AstrophysicsEntitystarEntityhydrogenEntityoxygenEntitylightEntitycarbonEntityMilky WayEntityheliumEntitygalaxyEntitysulfurEntityradioEntityneonEntitysiliconEntitymagnesiumEntityInternational Standard Book NumberEntitytelescopeEntityconstellationEntityopticsEntityX-rayEntityCategories12th century in scienceAstronomical objects discovered in the Middle AgesCassiopeia (constellation)Historical supernovaeSupernova remnants