NASA Launches By Karthik Pavani Aug 20, 1975 Viking 1 Orbiter Jul 7, 1988 Phobos 1 Orbiter Dec 4, 1996 Mars Pathfinder Jan 3, 1999 Mars Polar Lander Aug 4, 2007 Phoenix Mars Lander Nov 5, 2013 Mars Orbiter Mission 2020 Hope Orbiter Jul 30, 2020 Mars 2020 Perseverance Rover