Space flight

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

Great circle

Aerospace; Space flight

An imaginary circle on the surface of a sphere whose centre is at the centre of the sphere.

Gravity waves

Aerospace; Space flight

Certain dynamical features in a planet's atmosphere (not to be confused with gravitational waves, see above).

Gravity assist

Aerospace; Space flight

Technique whereby a spacecraft takes angular momentum from a planet's solar orbit (or a satellite's orbit) to accelerate the spacecraft, or the reverse. See Chapter 4.

Gravitational waves

Aerospace; Space flight

Einsteinian distortions of the space-time medium predicted by general relativity theory (not yet directly detected as of March 2010). (Not to be confused with gravity waves.)