flyby(redirected from fly by)
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flyby(flÿ -bÿ) A trajectory that takes a spaceprobe close to a planet or satellite but does not permit it to enter an orbit about the body or land on it.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
A close approach of a space vehicle to a target planet in which the vehicle does not impact the planet or go into orbit around it. Also known as swing-by.