auroras Definition

sunrise, dawn, daybreak, dawning, sunup, morning, break of day, break of the day, cockcrow, first light, dayspring, lights, aurora borealis, ionosphere, supernovae, perseids, meteor shower, meteors, cosmic rays, pulsars, quasar, magnetosphere, earthshine, epsilon aurigae, photosphere, astronomers, cosmic ray, comet, galaxies, nebulae, airglow, novae, gamma rays, planets, nightglow, cherenkov radiation, aurora australis, zodiacal light, neutron star, phosphorescence, sunspots, planetary nebula, noctilucent, prominences, occultation, oscillations, spicules, masers, neutrinos, exosphere, vortices, eclipsing binary, starlight, sundog, chromosphere, iapetus, meteoroid, astronomy, ejecta, omega centauri, celestial equator, astrometry, filaments, telescopes, nuclei, moons, polarimetry, mesosphere, latitudes, periodicities, annular eclipse, bolide, observatories, photons, astrophysical, jovian, saturnian, constellations, themis, thunderclouds, enceladus, radial velocity, milky way galaxy, syrtis major, protons, heliosphere, nebulosity, antineutrinos, starburst, equinox, anticyclones, andromeda galaxy, wavelengths, superfluid, particles, mimas, interstellar medium, jet stream, luminosities, corona australis,