The announced objectives of Zond 8 were investigations of the Moon and circumlunar space and testing of onboard systems and units. The spacecraft obtained photographs of Earth on 21 October from a distance of 64,480 km. The spacecraft transmitted flight images of Earth for three days. Zond 8 flew past the Moon on October 24, 1970, at a distance of 1110.4 km and obtained both black-and-white and color photographs of the lunar surface. Scientific measurements were also obtained during the flight.

Zond 8 reentered the Earth's atmosphere and splashed down 730 km SE of the Chagos Archipelago, in the Indian Ocean on 27 October 1970, 24 km from the USSR recovery ship Taman.

L1 was a Soviet spacecraft launched on Proton, designed in parallel of 7K-L1, which flew on the N-1 launcher. It was conceived to carry out crewed flybys of the Moon, like Apollo 8. This spacecraft sent the first living beings to fly over the Moon, turtles, on board Zond 5. The work made on this spacecraft will be used for the improvement of the Soyuz spacecraft.