jpl Definition

spacecraft, cassini, orbiter, lander, themis, astronomer, planetary, deep space, geosynchronous orbit, astrobiology, martian, phobos, asteroid, interplanetary, telescope, spaceflight, exobiology, astronautics, lunar, rovers, astronomy, deimos, moon, perilune, huygens, regolith, synchronous orbit, launch vehicle, jovian, skylab, microgravity, geosynchronous, dixi, principal investigator, ksc, tiros, afrl, exosphere, magnetosphere, astronauts, spectrographic, meteoritics, meteoroid, spectroscopic, planck, harlow shapley, sols, minos, retroreflector, astrophysical, cosmic ray, drogue parachute, thruster, orbits, caltech, radiometer, kepler, osiris, selene, gradiometer, airglow, flyby, upper atmosphere, comets, circumlunar, interferometer, wernher von braun, photometry, observatories, meteorological satellite, thermal emission, orbital velocity, cosmic radiation, payloads, smos, afspc, planets, satellites, spectrometers, corot, ncar, cosmochemistry, noachian, mossbauer, outer space, hypersonic, hydrosphere, ucsd, physicist, darpa, johannes kepler, geomagnetism, percival lowell, astron, heliocentric, spectroscopic analysis, photometer, liftoff, aeronomy, nima,