A failed Russian Venus probe, Cosmos 482, never left Earth orbit and may be crashing back soon. Owing to its design, large parts of the vehicle are expected to survive reentry.
Cosmos 482 got stranded in an Earth parking orbit, Mitchell told Space.com. Some hardware from that failed flight — a heavy frame of tanks and equipment that was jettisoned — fell into Earth’s atmosphere in rather short order. But some remained aloft.