The 50-plus-year-old spacecraft has been trapped in Earth orbit for decades. Now, it’s expected to fall back home.

Predictions for the earthly plunge of a wayward Soviet era Venus space probe are narrowing as the old spacecraft is expected to crash back to Earth Friday night.

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.