Linked from

The 32 pages that link to Planetary nebula, each with the reason it gives.

• Stellar evolutionBroader topic: It reveals the outer layers being shed before the star becomes a white dwarf.

• Stellar 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.

• Supernova remnantCompared with: Unlike a supernova remnant, it forms through gradual envelope ejection rather than a stellar explosion.

• 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.

• Asymptotic giant branchBroader topic: The exposed core ionizes gas expelled near the end of the branch.

• Exoplanet atmosphereCompared with: Despite its name, a planetary nebula is a stellar remnant, not a planet’s atmosphere.

• Emission nebulaCompared with: It can emit bright lines, but its gas was expelled by a dying star rather than ionized around a young one.

• Herbig–Haro objectCompared with: It is also a glowing nebula, but comes from an evolved star rather than a protostar.

• Messier catalogBroader topic: Objects such as the Ring Nebula are compact nebulae included in the catalog.

• NebulaBroader topic: It forms when a dying star sheds and illuminates its outer layers.

• 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.

• Circumstellar envelopeBroader topic: A planetary nebula can emerge when a hot remnant star illuminates previously expelled envelope material.

• Helium burningRelated: Evolved stars expel some products of helium burning into the interstellar medium.

• Circumstellar mediumBroader topic: It is a bright, evolved configuration of gas previously lost into the circumstellar environment.

• Ring NebulaNarrower topic: The Ring Nebula is a nearby, well-studied example of this stellar end stage.

• MiraBroader topic: Mira’s mass loss is an earlier stage of the process that can eventually produce one.

• Cat's Eye NebulaNarrower topic: The Cat's Eye is a detailed example of this late stage of stellar evolution.

• Reflection nebulaCompared with: Despite its name, it is a stellar ejecta shell, not a dust cloud reflecting nearby stars.

• Ring galaxyCompared with: Its apparent ring is a small stellar remnant, not a galaxy-scale structure.

• Planetary nebula luminosity functionNarrower topic: These nebulae supply the objects whose line luminosities form the distribution.

• Circumstellar discCompared with: It is an outflowing stellar envelope, not a flattened orbiting disc.

• Dumbbell NebulaNarrower topic: Messier 27 is a nearby, bright example of this class of stellar remnant.

• Jeans equationsBroader topic: Planetary nebulae can trace stellar motions in galaxy outskirts used for Jeans modeling.

• NGC 6302Narrower topic: NGC 6302 is a particularly complex example of this late stellar phase.

• 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.

• CW LeonisBroader topic: The mass CW Leonis now loses can contribute to a later planetary nebula.

• NebuliumRelated: Its low-density gas produces strong forbidden lines that helped expose the nebulium puzzle.

• NGC 7027Narrower topic: NGC 7027 is a compact, young example of this late stellar phase.