light year Definition

light second, astronomy unit, absolute magnitude, binary star, minor planet, intersidereal, triangulum australe, oort cloud, white dwarf, multiple star, hubble law, nebula, giant planet, standard candle, proxima centauri, major planet, andromeda galaxy, binary system, little bear, heliometer, apparent magnitude, parsec, metagalaxy, summer triangle, interplanetary space, inferior planet, milky way galaxy, galaxy, extraterrestrial object, spiral nebula, circumjovial, planetary nebula, crab nebula, constellation, giant star, stelliform, radio galaxy, apocynthion, coma berenices, apolune, spiral galaxy, orbit, star chart, sidereal time, alpha centauri, superior planet, inner planet, apastron, large magellanic cloud, sidereal year, evection, betelgeuse, cosmic background radiation, almucantar, neutron star, great bear, semidiameter, corona australis, supernova, interstellar space, intragalactic, beta centauri, radio astronomer, celestial equator, celestial sphere, chromatoscope, redshift, apojove, galactic, canis major, cometology, hubble, astronomical year, heliometry, quasar, asteroid belt, planet, small magellanic cloud, corona borealis, asteriated, collapsar, interplanetary medium, gravitational collapse, astronomical unit, dwarf star, lacertid, gravitational field, protogalaxy, asteroid, cepheid variable, outer planet, planetoid, solar telescope, magellanic cloud, metric linear unit, astrosphere, gravitational force, inglobate, ursa minor, equinoctial circle,