The 36th unmanned lunar probe of the Soviet Union's first lunar exploration program "Moon Program"
Moon 21(Russian:Луна 21)YesSoviet UnionFirst ofLunar explorationThe 36th unmanned moon planned for the "Moon Project"detector, launched on January 8, 1973 (06:55:38 UTC), belonging toSoviet UnionThe third generation unmanned lunar probe.takeLunar rover 2On the surface of the moon.