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Aerospace
Industry that includes methods of travel and spacecraft for navigating the air or space.
4Categories 22286Terms
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Aerospace > Space flight 
astronomical unit (AU)
Aerospace; Space flight
Based on the mean Earth-to-sun distance, 149,597,870 km. Refer to "Units of Measure" section for complete information.
astronomical twilight
Aerospace; Space flight
For technical definition, please follow this link to the U.S. Naval Observatory Astronomical Applications website.
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.
Sub-categories
- Control systems (1744)
- Satellites (11359)
- Space flight (8863)
- Space shuttle (354)