Goals: This was the Soviet Union's second attempt to crash a probe into the Moon. It carried sensors to mission to study interplanetary matter, cosmic radiation, magnetic fields of the Moon and cosmic ray intensity.
Accomplishments: None. Vibrations in the strap-on boosters caused the launch vehicle to explode 104 seconds after launch.
This second Soviet Moon mission was launched about 15 hours after America's second Moon launch -- Pioneer 1/Able 2.