The Infra-Red Calibration Balloon (S73-7) satellite had gone off the grid from radar not once but twice -- once in the 1970s and then again in the 1990s. After 25 years missing in orbit, it has finally been rediscovered.
The Infra-Red Calibration Balloon (S73-7) satellite had gone off the grid from radar not once but twice -- once in the 1970s and then again in the 1990s. After 25 years missing in orbit, it has finally been rediscovered.