PrivacySilicon Canalsabout 8 hours ago
Missing overbar doomed NASA's Mariner 1 Venus probe
9 min read
NASA's Mariner 1 Venus probe veered off course 293 seconds after launch and was destroyed mid-flight. The cause was a single missing overbar in handwritten guidance equations, which turned a smoothing instruction into a command chasing a phantom signal. The probe never reached Venus.
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