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St. Louis Science Center: Astronomy Fact Of The Day: November 13, 2021
Today in 1971, Mariner-9, the first man-made object to orbit another planet, entered Martian orbit. The mission of the unmanned craft wa ...
November 13, 2021
Today in 1971, Mariner-9, the first man-made object to orbit another planet, entered Martian orbit. The mission of the unmanned craft was to return photographs mapping 70% of the surface, and to study the planet’s thin atmosphere, clouds, and hazes, together with its surface chemistry and seasonal changes.
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This press release was produced by St. Louis Science Center. The views expressed here are the author’s own.