Friday, July 21, 2017

Mars 4, Soviet probe, launched 1973

The Soviets launched the Mars 4 probe on July 21, 1973 to orbit the Red Planet.  Shortly before it reached Mars, two of its on-board computers failed and it passed within 2000km of the Martian surface on February 10, 1974.  It did send back some information,  but little of it was useful.

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