An interplanetary flight in which the gravitational attraction of a planet is used to provide acceleration and a change in course(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "swingby" in a sentence
"This spectacular image of our home planet was captured by the OSIRIS instrument on ESA's Rosetta comet chaser today November 12 at 12:28 GMT from about 633,000 km as the spacecraft approached Earth for the third and final swingby."
"However, in a major disappointment – which had deepened the mystery — the Rosetta spacecraft did not experience the flyby anomaly during this swingby of Earth, even though the same spacecraft did experience the anomaly when it flew by Earth 2005, but didn't in 2007."
""For Rosetta's third and final Earth swingby, there was no anomaly.""