High Quality Content by WIKIPEDIA articles! Luna E-8-5 No.405, also known as Luna Ye-8-5 No.405, and sometimes identified by NASA as Luna 1970A, was a Soviet spacecraft which was lost in a launch failure in 1970. It was a 5,600-kilogram (12,000 lb) Luna E-8-5 spacecraft, the fifth of eight to be launched. It was intended to perform a soft landing on the Moon, collect a sample of lunar soil, and return it to the Earth.