| D008872 |
Microwaves |
That portion of the electromagnetic spectrum from the UHF (ultrahigh frequency) radio waves and extending into the INFRARED RAYS frequencies. |
EHF Waves,Extremely High Frequency Radio Waves,Micro Wave,Micro Waves,Ultrahigh Frequency Waves,Microwave Radiation,EHF Wave,Micro Waves,Microwave,Microwave Radiations,Radiation, Microwave,Ultrahigh Frequency Wave,Wave, EHF,Wave, Micro,Wave, Ultrahigh Frequency,Waves, Micro |
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| D011846 |
Radio Waves |
Electromagnetic waves with frequencies between about 3 kilohertz (very low frequency - VLF) and 300,000 megahertz (extremely high frequency - EHF). They are used in television and radio broadcasting, land and satellite communications systems, radionavigation, radiolocation, and DIATHERMY. The highest frequency radio waves are MICROWAVES. |
Hertzian Waves,High Frequency Waves,Radiowave,Radiowaves,Short Waves,Very High Frequency Waves,Frequency Wave, High,Frequency Waves, High,High Frequency Wave,Radio Wave,Short Wave,Wave, High Frequency,Wave, Radio,Wave, Short,Waves, Hertzian,Waves, High Frequency,Waves, Radio,Waves, Short |
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| D005060 |
Europe |
The continent north of AFRICA, west of ASIA and east of the ATLANTIC OCEAN. |
Northern Europe,Southern Europe,Western Europe |
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| D013026 |
Space Flight |
Travel beyond the earth's atmosphere. |
Space Exploration,Space Travel,Spaceflight,Exploration, Space,Explorations, Space,Flight, Space,Flights, Space,Space Explorations,Space Flights,Space Travels,Spaceflights,Travel, Space,Travels, Space |
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| D014481 |
United States |
A country in NORTH AMERICA between CANADA and MEXICO. |
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| D016081 |
Moon |
The natural satellite of the planet Earth. It includes the lunar cycles or phases, the lunar month, lunar landscapes, geography, and soil. |
Lunar Cycle,Lunar Phases,Moon Cycle,Moon Phases,Cycle, Lunar,Cycle, Moon,Cycles, Lunar,Cycles, Moon,Lunar Cycles,Lunar Phase,Moon Cycles,Moon Phase,Moons,Phase, Lunar,Phase, Moon,Phases, Lunar,Phases, Moon |
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| D061351 |
Telescopes |
Instruments used to observe distant objects. |
Binoculars,Binocular,Telescope |
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| D018480 |
Astronauts |
Members of spacecraft crew including those who travel in space, and those in training for space flight. |
Cosmonauts,Astronaut,Cosmonaut |
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| D018531 |
Spacecraft |
Devices, manned and unmanned, which are designed to be placed into an orbit about the Earth or into a trajectory to another celestial body. (NASA Thesaurus, 1988) |
Biosatellites,Launch Vehicle,Satellites, Artificial,Satellites, Man-Made,Space Capsule,Space Craft,Space Probe,Space Ship,Space Shuttle,Space Vehicles,Spaceship,Artificial Satellite,Artificial Satellites,Biosatellite,Capsule, Space,Capsules, Space,Launch Vehicles,Man-Made Satellite,Man-Made Satellites,Probe, Space,Probes, Space,Satellite, Artificial,Satellite, Man-Made,Satellites, Man Made,Shuttle, Space,Shuttles, Space,Space Capsules,Space Probes,Space Ships,Space Shuttles,Space Vehicle,Spacecrafts,Spaceships,Vehicle, Launch,Vehicles, Launch |
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| D018557 |
United States National Aeronautics and Space Administration |
An independent Federal agency established in 1958. It conducts research for the solution of problems of flight within and outside the Earth's atmosphere and develops, constructs, tests, and operates aeronautical and space vehicles. (From U.S. Government Manual, 1993) |
NASA,National Aeronautics and Space Administration |
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