huygens Definition

cassini, higgins, lander, spacecraft, orbiter, comet, orbit, planck, geosynchronous orbit, telescope, martian, flyby, asteroid, perilune, astronomical telescope, oort cloud, spectrometer, lunar, lunar crater, hubble, planetoid, saturnian, interplanetary, moon, iapetus, exoplanet, optical telescope, galilei, payload, occultation, rovers, themis, astronomers, johannes kepler, jpl, meteoroid, mossbauer, philae, osiris, cosmic ray, gradiometer, spectrograph, enceladus, airglow, kepler, heat shield, selene, lutetia, smos, radial velocity, sciamachy, exosphere, phobos, ejecta, corot, magnetosphere, christiaan huygens, dixi, retrorockets, mesosphere, perihelion, troposphere, jovian, astronauts, epsilon aurigae, polarimetry, drogue parachute, mimas, gyroscope, spaceward, tycho brahe, particle beam, ionosphere, thruster, minos, retroreflector, epimetheus, sols, orbital velocity, planets, polar, photometer, liftoff, cosmic microwave background, bathyscaphe, soyuz, geostationary orbit, phaethon, celestial sphere, andromeda galaxy, perigee, geosynchronous, spaceship, cosmos, nicolaus copernicus, cosmic dust, rock outcrop, quasar, lunar excursion module, photosphere,