Gravity assist

/ˈɡɹævɪti əˈsɪst/

"Gravity assist" in a Sentence (3 examples)

After going into orbit around Jupiter with a gravity assist from the volcanic moon Io, Galileo will spend 22 months studying the planet.

Cassini is supposed to swing by Earth in 1999 for a gravity assist that would sling it out toward Saturn.

MESSENGER successfully flew by Mercury yesterday, gaining a critical gravity assist that will enable it to enter orbit about Mercury in 2011.

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