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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

doppler effect

Aerospace; Space flight

The effect on frequency imposed by relative motion between transmitter and receiver. See Chapter 6.

descending 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 south.

density

Aerospace; Space flight

Mass per unit volume. For example, the density of water can be stated as 1 gram/cm3.

declination

Aerospace; Space flight

The measure of a celestial body's apparent height above or below the celestial equator.

decibel

Aerospace; Space flight

Db, an expression of ratio (see db, above). One tenth of a Bel. See NIST website for further definition.

coma

Aerospace; Space flight

The cloud of diffuse material surrounding the nucleus of a comet.

comets

Aerospace; Space flight

Small bodies composed of ice and rock in various orbits about the sun.