Browsed by
Year: 1973

Mars 4-6

Mars 4-6

July 21, 1973 to August 5, 1973

Mars 4, 5 and 6 all mostly failed due to faulty micro chips but they did manage to collect data proving Mars has an ionosphere as well as measuring a 6.7 milbar surface atmospheric pressure (Earth has an average of 1 bar).