2 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
Coherent
Aerospace; Space flight
Two-way communications mode wherein the spacecraft generates its downlink frequency based upon the frequency of the uplink it receives.
Giga (G)
Aerospace; Space flight
A multiplier, x109, from the Latin "gigas" (giant). See the entry for CGPM.
Universal constant of gravitation (G)
Aerospace; Space flight
Its tiny value (G = 6.6726 x 10-11 Nm2/kg2) is unchanging throughout the universe.
Fluorescence
Aerospace; Space flight
The phenomenon of emitting light upon absorbing radiation of an invisible wavelength.
Argument of periapsis
Aerospace; Space flight
The argument (angular distance) of periapsis from the ascending node.
Ascending node
Aerospace; Space flight
The point at which an orbit crosses a reference plane (such as a planet's equatorial plane or the ecliptic plane) going north.
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