Tags: Spacecraft.
Luna 18 (Ye-8-5 series) was an unmanned space mission of the Luna program also called Lunik 18.[citation needed]Luna 18 was placed in an earth parking orbit after it was launched and was then sent towards the Moon. On 7 September 1971 it entered lunar orbit. The spacecraft completed 85 communications sessions and 54 lunar orbits before it was sent towards the lunar surface by use of braking rockets.
