Goals: Like Luna 4 and 5, this was a Soviet attempt at a soft lunar landing.
Accomplishments: An error sent the spacecraft on the wrong trajectory, causing it to miss the Moon by 161,000 km. But mission controllers put Luna 6 through all the motions of an actual landing, jettisoning the lander and deploying the airbags as a practice run for an actual lunar landing.
This was the Soviet Union's third attempt to make a survivable landing on the Moon.