iapetus Definition

mimas, enceladus, comet, oort cloud, epimetheus, andromeda galaxy, uranus, jovian, planetoid, cassini, celestial sphere, saturnian, celestial equator, planetesimal, phobos, ejecta, moonlet, photosphere, syrtis major, perihelion, gravitational interaction, meteoroids, lithosphere, aurorae, mesosphere, nebula, interstellar medium, neutron star, spiral galaxy, protostar, exosphere, supercontinent, corona, galaxies, magnetosphere, quasar, heliosphere, epsilon aurigae, asthenosphere, milky way galaxy, chromosphere, zodiacal light, omega centauri, lavas, pulsar, chondrules, nebulosity, asteroids, cosmic rays, large magellanic cloud, magnetopause, planetary nebula, muon, triangulum, silicates, supernova, volcanism, airglow, antiprotons, superfluid, rifting, cosmic microwave background, quasicrystal, planets, asterism, baryon, nuclei, atoms, albedo, neutrino, equator, exoplanet, planitia, landmasses, strange quark, spherules, cosmic ray, fomalhaut, heliopause, eclipsing binary, antineutrinos, spicules, venusian, positrons, sundog, scarps, perigee, torus, aphelion, troposphere, antiparticles, corot, gyre, subatomic particle, arcsecond, polarimetry, earthshine, monoceros, equatorial, anticyclones,