KnowraPlanetary nebulaLinked fromLinked fromThe 32 pages that link to Planetary nebula, each with the reason it gives.All 32Broader topic 9Related 10Narrower topic 6Compared with 7Stellar windRelated: Earlier stellar winds help shape the nebula’s gas before and during its formation.White dwarfRelated: The nebula often surrounds the newly exposed hot core on its way to becoming a white dwarf.William HerschelRelated: Herschel coined this name because these nebulae appeared planet-like through his telescopes, though they are unrelated to planets.Red giantRelated: Mass loss during the giant phases can leave gas that later becomes a planetary nebula.StarRelated: It returns enriched material to space as the star’s core becomes a white dwarf.Carbon starRelated: Some carbon-rich giants later expose their cores and illuminate their expelled envelopes as planetary nebulae.Helium burningRelated: Evolved stars expel some products of helium burning into the interstellar medium.Black dwarfRelated: Its dispersal exposes the stellar core that becomes a white dwarf.Common envelopeRelated: Binary interaction during envelope ejection can shape the nebula's structure.NebuliumRelated: Its low-density gas produces strong forbidden lines that helped expose the nebulium puzzle.