- Industry: Aerospace
- Number of terms: 16933
- Number of blossaries: 2
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The Executive Branch agency of the United States government, responsible for the nation's civilian space program and aeronautics and aerospace research.
Circular polarization of an electromagnetic wave is a polarization where the tip of the electric field vector, at a fixed point in space, describes a circle as time progresses. If the wave is frozen in time the electric field vectors describe a helix along the direction of propagation. Circular polarization is a limiting case of the more general condition of elliptical polarization.
Industry:Aerospace
Orbit in which the spacecraft moves in the opposite direction from the planet's rotatation. See prograde.
Industry:Aerospace
Unit of angular measurement equal to the angle at the center of a circle subtended by an arc equal in length to the radius. Equals about 57.296 degrees.
Industry:Aerospace
Quasi-stellar object observed mainly in radio waves. Quasars are extragalactic objects believed to be the very distant centers of active galaxies.
Industry:Aerospace
Orbit in which the spacecraft moves in the same direction as the planet rotates. See retrograde.
Industry:Aerospace
Ninth planet from the sun, sometimes classified as a small terrestrial planet.
Industry:Aerospace
Electrically conductive fourth state of matter (other than solid, liquid, or gas), consisting of ions and electrons.
Industry:Aerospace
The angular distance between peaks or troughs of two waveforms of similar frequency.
Industry:Aerospace
