5 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
Specific impulse
Aerospace; Space flight
A measurement of a rocket's relative performance. Expressed in seconds, the number of which a rocket can produce one pound of thrust from one pound of fuel. The higher the specific impulse, the less ...
Si derived unit
Aerospace; Space flight
One of many SI units of measure expressed as relationships of the SI base units. For example, the watt, W, is the SI derived unit of power. It is equal to joules per second. W = m2 ā kg ā sā3 ...
Si base unit
Aerospace; Space flight
One of seven SI units of measure from which all the other SI units are derived. See SI derived unit.
Pyrotechnic switching unit (PSU)
Aerospace; Space flight
The unit onboard a spacecraft that provides redundant power conditioning and energy storage, and, upon command, redundant power switching for firing electro-explosive or pyro devices. The PSU has the ...
Prograde
Aerospace; Space flight
Orbit in which the spacecraft moves in the same direction as the planet rotates. See retrograde.
Pluto
Aerospace; Space flight
Ninth planet from the sun, sometimes classified as a small terrestrial planet.
