 Muna 1971 ndeipi tsvakurudzo yemuchadenga yeUSA yakatanga kutenderera imwe nyika?Muna 1971, USA space probe Mariner 9 yakave yekutanga spacecraft kutenderera imwe nyika. Mariner 9 yakavambwa neNASA uye yakabudirira kupinda orbit yakatenderedza Mars. Yakapa data yakakosha uye mifananidzo yeMartian pamusoro nemhepo, ichishandura manzwisisiro edu eRed Planet. Mariner 9s mission yakaratidza kubudirira kwakakosha mukutsvagisa muchadenga nekubudirira kupinza orbital kutenderedza muviri wedenga kunze kweNyika. 