13 Terms
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Space flight
Of or relating to the act of voyaging outside the Earth's atmosphere and into outer space, and the science involved in achieving it.
Industry: Aerospace
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Space flight
Plunge
Aerospace; Space flight
In describing the tracking motion of an AZ-EL or ALT-AZ mounted radio telescope, to "plunge" means to exceed 90° in elevation and then to continue tracking as elevation decreases on the other side ...
Circular polarisation (CP)
Aerospace; Space flight
Circular polarisation of an electromagnetic wave is a polarisation 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 ...
Radian
Aerospace; Space flight
Unit of angular measurement equal to the angle at the centre of a circle subtended by an arc equal in length to the radius. Equals about 57.296 degrees.
Quasar
Aerospace; Space flight
Quasi-stellar object observed mainly in radio waves. Quasars are extragalactic objects believed to be the very distant centres of active galaxies.
Right ascension
Aerospace; Space flight
The angular distance of a celestial object measured in hours, minutes, and seconds along the celestial equator eastward from the vernal equinox.
Rise
Aerospace; Space flight
As in ascending above the horizon, for the technical definition, please follow this link to the U.S. Naval Observatory's Astronomical Applications.
Set
Aerospace; Space flight
As in going below the horizon, for the technical definition, please follow this link to the U.S. Naval Observatory's Astronomical Applications.
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