celestial equator, celestial sphere, longitudes, ecliptic, galactic equator, equilateral triangle, meridian, isosceles triangle, aphelion, syrtis major, antipodal, umbra, capricornus, easterly, asterism, magnetic pole, oort cloud, geoid, promontories, lagrangian, ellipse, equator, sidereal, heliopause, latitudinal, omega centauri, antarctic continent, perihelion, monoceros, vernal equinox, autumnal equinox, triangulum, greenwich mean time, crescent, earthshine, biogeographic, drake passage, planetoid, tyrrhenian sea, iapetus, landmasses, eratosthenes, doppler effect, zodiacal light, edmond halley, photosphere, proxima centauri, solstices, celestial pole, ushant, southeasterly, equinox, anticyclonic, radians, drumlin, equidistance, equinoxes, blackbody, landmass, isobars, planitia, ithaki, meridional, equatorial, isotherms, cepheus, icefield, algol, gnomon, ross ice shelf, sunward, astrometry, craton, centroid, horsehead nebula, polar, corot, antarctic peninsula, annular eclipse, subarctic, unpolarized, nebulosity, supercontinent, jovian, terra incognita, northerly, chondrites, boson, kerguelen, dipolar, hadrosaurus, datum, milky way galaxy, achernar, hypotenuse, venusian, libration, moonset, puppis, andromeda galaxy, galactic plane, kattegat

line of longitude, longitude, meridian