| A) | 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 |
| B) | Beyond, Big Bang theory, Binary, Black hole, Blazing, Bodies, Buffet, Burn, Burst, Byproduct |
| C) | 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 |
| D) | Danger, Data, Declination, Degree, Density, Deploy, Descendant, Descent, Disaster, Discovery, Disintegrate, Display, Distant, Documentation, Domination, Double star, Drift, Dust, Dust, Dwarf planet |
| E) | 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 |
| F) | Fireball, Flight, Fluorocarbon content, Force field, Formation, Fossil fuel, Fragment, Full moon |
| G) | Galactic, Galaxy, Galileo, Gamma rays, Gaseous, Geocentric, Geophysics, Global, Glory, Gravitation, Gravity, Gyroscope |
| H) | Halley, Hazard, Head-quarters, Heat, Heavenly body, Hemisphere, Herschel (Alexander and Caroline), Historic, Honor, Horizon, Horizon, Horoscope, Hubble, Hydraulic, Hypothesis |
| I) | Icy, Ignite, Ignition, Illumination, Image, Immediate, Impact, Impulse, Industry, Inquiry, Inspection, Instruments, Intergalactic, Interplanetary. Interstellar, Investigation, Ionosphere, Ions |
| J) | Jettison, Journey, Jupiter, Justification |
| K) | Kilometers, Kuiper Belt |
| L) | Laboratory, Launch, Launch pad, Legacy, Liftoff, Light years, Luminosity, Lunar |
| M) | Magnetic, Magnitude, Maneuver, Map, Mare, Mars, Marvel, Measurements, Meteor, Meteorite, Methane, Milky Way, Mission, Module, Molecules, Moons |
| N) | Nadir, NASA, Navigation, Nebula, Newton, Node, North Star, Northern Lights, Nova, Nutation |
| O) | Objective, Objects, Observable, Operation, Orbit, Origin, Orrery, Outer space, Overlap, Ozone |
| P) | Parallax, Particles, Path, Penetrate, Penumbra, Perigee, Phase, Pioneer, Planet, Planetarium, Planetary, Polestar, Positions, Praise, Probe, Productive, Program, Propellant, Propulsion, Protection, Proton, Prototype, Public, Pulsar |
| Q) | Quarter moon, Quasar, Quintessence |
| R) | Radiation, Rays, Re-entry, Reflector, Reject, Relativity, Reliability, Rendezvous, Research, Responsibility, Restriction, Revolution, Rings, Rocket, Rocks, Rotation |
| S) | 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 |
| T) | Technology, Telescope, Temperature, Terra, Thrust, Tide, Track, Tragedy, Training, Trajectory, Transmissions, Transport, Turbulence, Twinkle |
| U) | Ultraviolet rays, Umbra, Unique, Universe, Unknown, Unstable, Uranus |
| V) | Vaporize, Variation, Variety, Vast, Vehicle, Velocity, Vent, Vibration, Vicinity, View, Violence, Virtual, Visible, Vision, Volcanic, Voluntary, Voyage |
| W) | Waning moon, Warming, Wavelength, Waxing moon, Weather, Weightlessness, Whirl |
| Z) | Zeal, Zenith, Zero, Zodiac, Zone |
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