aberration, absolute, acceleration, achievement, administration, adventure, aerodynamics, aerogel, aerospace, agency, Air Force, alien, altitude, ambient, ammonia, analysis, anomaly, apex, aphelion, apogee, apotheosis, arc, ascendant, asteroid, astronaut, astronomer, astronomy, atmosphere, aurora borealis, axis, azimuth
beyond, Big Bang theory, binary, black hole, blazing, bodies, buffet, burn, burst, byproduct
carbon dioxide, celestial, centrifugal force, ceremony, Challenger, chaos, circular, cislunar, climate, clouds, cold, collision, colossal, combust, comet, commander, communication, composition, conjunction, consequence, constellation, contribution, corona, cosmic, cosmology, cosmonaut, crater, crew, crowd, cusp
danger, data, declination, degree, density, deploy, descendant, descent, disaster, discovery, disintegrate, display, distant, documentation, domination, double star, drift, dust, dust, dwarf planet
eclipse, ecliptic, Edmond; halo, Einstein, electron, ellipse, emission, encircle, engineer, eon, equator, equinox, equipment, evidence, evolution, exobiology, expansion, expedition, experiment, exploration, explosion, exposure, external, extraterrestrial
fireball, flight, fluorocarbon content, force field, formation, fossil fuel, fragment, full moon
galactic, galaxy, Galileo, gamma rays, gaseous, geocentric, geophysics, global, glory, gravitation, gravity, gyroscope
Halley, hazard, head-quarters, heat, heavenly body, hemisphere, Herschel (Alexander and Caroline), historic, honor, horizon, horizon, horoscope, Hubble, hydraulic, hypothesis
icy, ignite, ignition, illumination, image, immediate, impact, impulse, industry, inquiry, inspection, instruments, intergalactic, interplanetary. Interstellar, investigation, ionosphere, ions
jettison, journey, Jupiter, justification
kilometers, Kuiper Belt
laboratory, launch, launch pad, legacy, liftoff, light years, luminosity, lunar
magnetic, magnitude, maneuver, map, mare, Mars, marvel, measurements, meteor, meteorite, methane, Milky Way, mission, module, molecules, moons
nadir, NASA, navigation, nebula, Newton, node, North Star, Northern Lights, nova, nutation
objective, objects, observable, operation, orbit, origin, orrery, outer space, overlap, ozone
parallax, particles, path, penetrate, penumbra, perigee, phase, pioneer, planet, planetarium, planetary, polestar, positions, praise, probe, productive, program, propellant, propulsion, protection, proton, prototype, public, pulsar
quarter moon, quasar, quintessence
radiation, rays, re-entry, reflector, reject, relativity, reliability, rendezvous, research, responsibility, restriction, revolution, rings, rocket, rocks, rotation
satellite, scientific, scientist, seismometer, sensation, session, sextant, shooting star, shuttle, significant, simulation, Sir Issac, size, sky, soar, solar system, solstice, space, space craft, spatial, spectrometry, spectrum, spherical, spinning, star dust, stars, stellar, storms, stratosphere, subatomic, success, sunspot, super nova, support, sustain, swirling, syzygy
technology, telescope, temperature, terra, thrust, tide, track, tragedy, training, trajectory, transmissions, transport, turbulence, twinkle
ultraviolet rays, umbra, unique, universe, unknown, unstable, Uranus
vaporize, variation, variety, vast, vehicle, velocity, vent, vibration, vicinity, view, violence, virtual, visible, vision, volcanic, voluntary, voyage
waning moon, warming, wavelength, waxing moon, weather, weightlessness, whirl
zeal, zenith, zero, Zodiac, zone
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