Zond 1c was a 3MV-1 series Venus probes that carried a landing capsule. It was left in Earth orbit when the upper stage of the launch vehicle failed. March 27, 1964 at 03:24 UTC · Launch Failure Molniya 8K78 — Soviet Space Program, to Venus flyby 1/5, Baikonur Cosmodrome, Republic of Kazakhstan The world's 311th orbital launch attempt, and 18th of 1964. Data: Launch Library 2, The Space Devs. Image via The Space Devs.