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gravity assist
n.
The use of the energy obtained from a gravitational field to change the speed or shape of a spacecraft's orbit.
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Universalium. 2010.
gravityassist
Look at other dictionaries:
Gravity assist — In orbital mechanics and aerospace engineering, a gravitational slingshot, gravity assist or swing by is the use of the relative movement and gravity of a planet or other celestial body to alter the path and speed of a spacecraft, typically in… … Wikipedia
