perihelion Definition

aphelion, perigee, celestial equator, ecliptic, sidereal, oort cloud, equinox, comet, uranus, celestial sphere, perilune, proxima centauri, vernal equinox, occultation, planetoid, asteroid belt, heliopause, photosphere, umbral, equinoxes, orbits, mesosphere, epsilon aurigae, sextile, orbital velocity, spring equinox, exosphere, iapetus, autumnal equinox, phaethon, radial velocity, prograde, hubble constant, corot, arcsecond, moonlet, saturnian, equator, solstices, interstellar space, heliosphere, zodiacal light, jovian, planetary nebula, galactic equator, lagrangian, gravitational interaction, capricornus, tropopause, cassini, syrtis major, annular eclipse, milky way galaxy, uranian, airglow, venusian, annularity, meteoroids, polarimetry, aurigae, sunspots, earthshine, photometry, lutetia, magnetosphere, redshift, planets, synchronous orbit, neutron star, luminosities, obliquity, asterism, midheaven, protostar, chondrites, triangulum, trine, coronagraph, magnetopause, enceladus, exoplanet, flyby, geosynchronous orbit, kelvin, apolune, antineutrinos, infrared radiation, baryons, omega centauri, perseids, conjunct, photoemission, andromeda galaxy, betelgeuse, quasar, interstellar medium, chromosphere, pleiades, fomalhaut, retrogrades,