On this day in space! Nov. 13, 1971: NASA's Mariner 9 becomes 1st spacecraft to orbit Mars, revealing close looks at the Martian surface
Facebook X Reddit Pinterest Flipboard Email 0 On Nov. 13, 1971, Mariner 9 became the first spacecraft to orbit Mars. At the time, scientists didn't know much about the Red Planet. NASA had several Mars flybys before Mariner 9. Those flybys showed that Mars had…