The Venera mission, which launched from Kazakhstan on March 31, 1972, failed long before the Soviet Union could attempt to touch down on Venus. Because of a propulsion problem, it never escaped Earth's orbit. A half-century later, the landing capsule was predicted to reenter the atmosphere. That day arrived on Saturday, May 10.

Kosmos 482, was launched by the USSR in 1972 and once bound for Venus, but a badly configured timer onboard the probe meant it never left our planet's orbit.

Launched in 1972 by the Soviet Union, the spacecraft known as Kosmos 482 was part of a series of missions bound for Venus. But this one never made it out of orbit around Earth, stranded there by a rocket malfunction.