spacecraft, geosynchronous, geostationary orbit, orbiter, geosynchronous orbit, interplanetary, geostationary, prograde, spaceward, circumlunar, hypervelocity, satellites, circularize, orbital velocity, ballistic trajectory, planetary, synchronous orbit, ionospheric, azimuthal, lagrangian, retroreflector, astrometry, perilune, corot, jovian, celestial, libration, thruster, celestial sphere, planets, coronagraph, lander, cassini, dynamical, magnetic flux, radial velocity, gravitational interaction, perihelion, zero gravity, magnetic dipole, spacefaring, asteroidal, soyuz, outer space, coronal, interstellar, attosecond, drogue parachute, suborbital, circumstellar, obliquity, gimbaled, ellipsoid, quadrupole, magnetosphere, kinematic, astronauts, lacrimal, arcsecond, moonlet, deg, huygens, sidereal, propulsion, photometry, astrophysical, retrorockets, perigee, microgravity, spaceship, airglow, proxima centauri, shuttle, meteoroid, ephemeris, unpowered, epsilon aurigae, oort cloud, interstellar space, lunar, corona, protostar, precess, inertial guidance, micrometeorite, saturnian, dipolar, aphelion, gravitational, hylas, polar, extravehicular, cometary, cosmic microwave background, intervertebral, particle beam, auroral, equatorial, extragalactic, coplanar, photoelectron, galactic, orbitals, electron, subshell, i.e., eigenstates, node, electrons, exciton, fig, orbit, segment, sublevel, excitons, mos, subband, vertex, angle, branch, excitations, fio, intraorbital, sphenoid, pelvic, mastoid, buccal, ethmoidal, infraorbital, petrous, pharyngeal, supraorbital, scrotal, tympanic, articular, lingual, occipital, parietal, periorbital, acetabular, alveolar

ephemeris time, glenn, gyration, harmonic law, john glenn, kepler's second law, kepler's third law, orbital rotation, perturb, planetal, planetary, revolution, rotation, superior ophthalmic vein, tdt, terrestrial dynamical time, terrestrial time, tt