planetary nebula Definition

nebula, spiral galaxy, quasar, large magellanic cloud, andromeda galaxy, neutron star, milky way galaxy, small magellanic cloud, oort cloud, proxima centauri, zodiacal light, extragalactic, gravitational interaction, cepheid variable, nebulosity, betelgeuse, coma berenices, comet, exoplanet, redshift, planetesimal, supergiant, gravitationally, protostar, supernovae, galaxies, ejecta, eclipsing binary, omega centauri, photosphere, circumstellar, interstellar medium, chromosphere, epsilon aurigae, asterism, trifid, chondrules, sundog, luminosities, asteroidal, aurorae, ionised, monoceros, planets, corona, pulsars, novae, phaethon, nuclei, filamentary, aurigae, puppis, horsehead nebula, nucleosynthesis, triangulum, vortices, fomalhaut, enceladus, prominences, silicates, moonlet, strange quark, airglow, tarantula nebula, spectroscopically, syrtis major, baryons, atoms, sunspot, ionise, corot, chondrites, gibbous, camelopardalis, superfluid, perihelion, eridanus, jovian, masers, exosphere, torus, coronagraph, cosmic microwave background, ionize, olivine, planetoids, starburst, spheroidal, radioactive decay, suns, prograde, fermion, unpolarized, supercontinent, astronomers, plagioclase, magnetosphere, antiparticles, boson, gamma rays,