ent of the Angular Momentum Vectors of Planetary Nebulae in the Galactic Bulge", Mon. Not. R. Astron. Soc (SpaceTelescope.org), http://www.spacetelescope.org/static/archives/releases/science_papers/heic1316a.pdf  Planetary Nebulae, SEDS, September 9, 2013, http://messier.seds.org/planetar.html, ප්‍රතිෂ්ඨාපනය 2013-11-10 External links[සංස්කරණය]ග්‍රහ නිහාරිකා හා සබැඳි මාධ්‍ය විකිමාධ්‍ය කොමන්ස් හි ඇත.Entry in the Encyclopedia of Astrobiology, Astronomy, and SpaceflightPress release on recent observations of the Cat's Eye NebulaPlanetary Nebulae, SEDS Messier PagesThe first detection of magnetic fields in the central stars of four planetary nebulaePlanetary Nebulae—Information and amateur observationsPlanetary nebula on arxiv.orgvteතරුEvolutionFormationPre-main-sequence starMain sequenceRed giant branchHorizontal branchAsymptotic giant branchDredge-upInstability stripRed clumpPG1159 starMira variablePlanetary nebulaProtoplanetary nebulaLuminous red novaLuminou