A Soviet-era spacecraft meant to land on Venus a half century ago is expected to plunge uncontrolled back to Earth within days.

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.

The 50-plus-year-old spacecraft was trapped in Earth orbit for decades. Now, it has likely fallen back home, according to the European Space Agency.