Luna 10

Part of the E-6S series, Luna 10 was battery powered and had an on-orbit dry mass of 540 kg. Scientific instruments included a gamma-ray spectrometer for energies between 0.3–3 MeV (50–500 pJ), ==The flight==

Luna 10 launched towards the Moon on 31 March 1966 at 10:48 GMT. After a midcourse correction on 1 April, the spacecraft entered lunar orbit on 3 April 1966 and completed its first orbit three hours later (on 4 April Moscow time). A 245-kilogram Luna 10 operated for 460 lunar orbits and performed 219 active data transmissions before radio signals were discontinued on 30 May 1966. The spacecraft eventually crashed on the moon on an unknown date. ==The Internationale==

The spacecraft carried a set of solid-state oscillators that had been programmed to reproduce the notes of "The Internationale", so that it could be broadcast live to the 23rd Congress of the Communist Party of the Soviet Union. During a rehearsal on the night of 3 April, the playback went well, but the following morning, controllers discovered a missing note and played the previous night's tape to the assembled gathering at the Congress—claiming it was a live broadcast from the Moon. File:Luna 10 Space Probe.jpg|Replica of Luna 10, Tsiolkovsky State Museum of the History of Cosmonautics File:Laika ac Memorial Museum of Astronautics (6995717351).jpg|Luna 10 model (suspended), Memorial Museum of Cosmonautics File:1966 CPA 3380.jpg|Commemorative stamp == See also ==