Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The use of the energy obtained from a gravitational field to change the speed or shape of a spacecraft's orbit.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun astrophysics The
favorable alteration of thespeed andtrajectory of aspacecraft as a result of its passingnear to acelestial body .
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