V’GER SMILES: Something strange is up with 45-year-old spacecraft Voyager 1. “Voyager 1’s altitude articulation and control system (AACS) is sending back some strange readings, and engineers are puzzled as the craft is still operating normally. The AACS is responsible for keeping Voyager in the right orientation and making sure that its antenna is pointing toward Earth so that the spacecraft can transmit data. But now, the AACS is sending back data that doesn’t make any sense — the data looks like it could be scrambled, for example, or suggests that the system is in an impossible state — even though the antenna is still pointing the right way and transmitting just fine.”
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