S1W4I1N1G2B3Y4S1
17 points
SWINGBYS is validvalid
SWINGBY, a mission in which a spacecraft uses a planet's gravitational pull for making course changes [n]
SWINGBY, a spacecraft mission which uses gravitational pull [n]
SWINGBY, a mission in which a spacecraft uses a planet's gravitational pull for making course changes [n]
SWINGBY, a spacecraft mission which uses gravitational pull [n]