The mission of Surveyor 7 was to explore a region of the Moon other than lunar maria and into the lunar highlands. Surveyor 7 was the first probe to detecet the faint glow on the lunar horizon after dark that is now thought to be light reflected from electrostatically levitated

The mission of Surveyor 6 was to demonstrate the technology necessary to achieve landing and operations on the lunar surface. Before termination of operations, on Nov. 17, 1967, Surveyor 6 was commanded to fire its three main liquid propellant thrusters for 2.5 seconds.

The mission of Surveyor 5 was to demonstrate the technology necessary to achieve landing and operations on the lunar surface. Surveyor 5 was the first human spacecraft to complete a soil analysis on another celestial boday other than Earth.

Lunar Orbiter 5 completed the farside coverage and acquired medium (20 m) and high (2 m) resolution images of 36 pre-selected areas. Luna Orbiter 5's primary mission was to contribute to a comprehensive map of the Moon and conduct general observational surveys.

Explorer 35, also known as the Anchored Interplanetary Monitoring Platform (AIMP-E or AIMP-6) was designed to study interplanetary space phenomena, particularly the solar wind, the interplanetary magnetic field, dust distribution near the Moon, the lunar gravitational field, the weak lunar ionosphere, and the radiation environment.

The mission of Surveyor 4 was to demonstrate the technology necessary to achieve landing and operations on the lunar surface. Radio signals from the spacecraft stopped a few minutes before landing and contact was never reestablished.

Lunar Orbiter 4 photographed the entire nearside and 95% of the farside, and Lunar Orbiter 5 completed the farside coverage and acquired medium (20 m) and high (2 m) resolution images of 36 pre-selected areas Lunar Orbiter 4's primary mission was to contribute to a comprehensive map of the

Surveyor 3 was designed to achieve a soft landing on the lunar surface and to return lunar surface photography and other data. Astronauts from Apollo 12 made contact with Surveyor 3 and recovered parts to return to Earth so that scientists could evaluate the effects of nearly two-and-a-half years of

Lunar Orbiter 3's primary mission was to photograph smooth areas of the lunar surface to help select safe landing sites for the Apollo missions. The spacecraft's mission was site confirmation as opposed to site search.