Gravity assist facts for kids

Kids Encyclopedia Facts

A gravitational slingshot, gravity assist maneuver or swing-by is the use of the relative movement and gravity of a planet to alter the path and speed of a spacecraft, typically in order to save fuel, time, and expense. Gravity assistance can be used to speed up, slow down and/or change the path of a spacecraft. The "assist" is provided by the motion of the gravitating body as it pulls on the spacecraft.

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Gravity assist Facts for Kids. Kiddle Encyclopedia.