November 14 1971 Mariner 9 becomes first spacecraft to orbit another planet (Mars) Advisist ResearcherNovember 14, 2020Calendar 1971 Mariner 9 becomes first spacecraft to orbit another planet (Mars)Source: http://www2.jpl.nasa.gov/history/70s/Mariner9_1971_2.htm Previous Post Hello World! Next Post November 15
