Part of a Soviet spacecraft, Kosmos 482, is expected to crash back down to Earth this weekend, uncertain of the landing location.Launched in 1972, the spacecraft was intended for Venus but failed to escape low Earth orbit and broke into four pieces.The robust design of the spacecraft, meant to withstand Venus's extreme conditions, is likely to survive re-entry into Earth's atmosphere.The landing probe could crash between latitudes of 52 degrees north and 52 degrees south, with expected re-entry from 9 to 10 May.