Assertion: spacecraft's orbit | /r/CapableOf | allow return
Facets:
value: to earth
type: TRANSITIVE-OBJECT
Source sentences:
text: The first three lunar missions (Apollo 8, Apollo 10, and Apollo 11) used a free return trajectory, keeping a flight path coplanar with the lunar orbit, which would allow a return to Earth in case the SM engine failed to make lunar orbit insertion.