What is another word for gravity-assist?
Pronunciation: [ɡɹˈavɪtiɐsˈɪst] (IPA) 
Gravity-assist is a term used in space exploration to describe a technique that uses the gravitational pull of a planet or moon to help spacecraft gain momentum and change direction without using any fuel. Synonyms for gravity-assist include sling-shot mechanism, gravitational slingshot, and planetary swingby. All of these terms refer to the same principle that uses a celestial body's gravity to accelerate or deflect a spacecraft on its trajectory. Other similar terms include gravitational assist, gravitational assist maneuver, or simply gravity boost. As human space exploration continues to advance, more advanced gravity-assist techniques are being developed to allow spacecraft to travel further and faster than ever before.
