Complex sentence: The Lunar Orbiter 3 was a spacecraft launched by NASA in 1967 part of the Lunar Orbiter Program,, designed primarily to photograph areas of the lunar surface for confirmation of safe landing sites for the Surveyor and Apollo missions.
Split into simpler sentences: The Lunar Orbiter 3 was a spacecraft launched by NASA in 1967 as part of the Lunar Orbiter Program. It was designed primarily to photograph areas of the lunar surface for confirmation of safe landing sites for the Surveyor and Apollo missions.