planetary nebula, galaxies, supernovae, quasars, planets, andromeda galaxy, epsilon aurigae, trifid, omega centauri, milky way galaxy, photosphere, aurorae, constellations, novae, protostar, pulsars, planetoids, eclipsing binary, neutron star, spiral galaxy, chromosphere, comets, moons, gamma rays, astrophysical, nucleosynthesis, extragalactic, nebulosity, large magellanic cloud, monoceros, prominences, betelgeuse, horsehead nebula, ejecta, astronomers, chondrules, interstellar medium, sundog, cosmic rays, canes venatici, asterism, coronagraph, small magellanic cloud, corona, meteoroids, enceladus, exoplanet, luminosities, zodiacal light, magnetosphere, gravitational interaction, moonlet, jovian, perseids, triangulum, singularities, pleiades, oort cloud, masers, suns, orbits, canis major, cosmos, puppis, neutrinos, silicates, asteroids, baryons, gamma ray, vortexes, exosphere, starlight, asteroid belt, blobs, cosmic microwave background, serpens, proxima centauri, coma berenices, syrtis major, plagioclase, redshift, airglow, meteors, radial velocity, haloes, earthshine, nuclei, atoms, galactic, camelopardalis, spectra, magmas, phosphorescence, prograde, astrometry, fomalhaut, spicules, mimas, tarantula nebula, sunspots, filaments, noctilucent, nebula, galaxy, stars, clusters, cluster, clumps, galls, halos, craters, nucleoli, cerebellum, clavicle, cranium, curvature, duodenum, else, esophagus, foetus, larynx, lustre, medulla, occurrent, oesophagus, pharynx, sclera, thorax, today, trachea, urethra

edwin hubble, edwin powell hubble, extragalactic nebula, galaxy, hubble, maria mitchell, mitchell