1962.7.22 MARINER 1, the first US Venus spacecraft, failed its mission after 293 seconds

MARINER 1 was the first spacecraft launched on Venus in the Mariner series. 293 seconds after launching, due to the unexpected directional turns, the mission of MARINER 1 failed.

1962.8.25 USSR SPUTNIK 23 fell down to the ground after three day orbiting

USSR SPUTNIK 23 with total weight of 89,000 kg attempted to flyby Venus was successfully launched by SL-6/A-2-e rocket to the earth's orbit. Due to the inefficiency of jettison, SPUTNIK 23 impacted on the earth after going on the orbit for three days.