After a pair of satellites failed to reach their desired orbit around the moon last year, China used a novel gravity "slingshot" tactic to get the satellites in the correct spot.

China uses 'gravity slingshot' to rescue pair of wayward moon satellites

Source: space
Source Link: https://www.space.com/astronomy/moon/china-uses-gravity-slingshot-to-rescue-pair-of-wayward-moon-satellites