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Aerospace
Industry that includes methods of travel and spacecraft for navigating the air or space.
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Aerospace > Space flight 
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 = ...
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.
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.
semi-major axis
Aerospace; Space flight
Half the distance of an ellipse's maximum diameter, the distance from the center of the ellipse to one end.
Sub-categories
- Control systems (1744)
- Satellites (11359)
- Space flight (8863)
- Space shuttle (354)