tombaugh Definition

asteroid, exoplanet, telescope, astronomy, comet, spacecraft, orbit, planetoid, edwin hubble, astronomers, astronomical telescope, hipparchus, fomalhaut, meteorite, observatory, virts, proxima centauri, planck, weatherwax, perihelion, sandage, kepler, cassini, earhart, planets, percival lowell, nicolaus copernicus, tycho brahe, epsilon aurigae, clopper, shapley, severy, reigner, space shuttle, supernovae, nosel, harlow shapley, dingey, bibler, rockhound, gene roddenberry, redwine, flemer, pleiades, huygens, reule, girkin, balsa raft, fluty, hans bethe, repp, stillion, ostro, missel, priser, crowner, valure, christa mcauliffe, pulsars, lutetia, kroto, chondrites, feynman, wernher von braun, edmund halley, richard feynman, dentel, large magellanic cloud, lopeman, cosmic ray, onate, alan shepard, romage, radial velocity, celestial sphere, cassiopeia, vespucci, shearn, fossett, havener, galileo galilei, robert bunsen, hickam, amelia earhart, carl friedrich gauss, boson, bohr, eggler, moonlet, herl, rasure, pierre curie, planetary nebula, cradler, gladen, edmond halley, dippel, holp, astrometry, boehme,