Venus flyby probe November 23, 1965 at 03:14 UTC · Launch Failure Molniya 8K78 — Soviet Space Program, to Venus flyby 31/6, Baikonur Cosmodrome, Republic of Kazakhstan The world's 498th orbital launch attempt, and 105th of 1965. Data: Launch Library 2, The Space Devs. Image via The Space Devs.