Nasa's missions to Mars By mdog123 Period: Jan 1, 1964 to Dec 31, 2007 Nasa's Missions to Mars May 30, 1971 Mariner 9-Mars Orbiter Aug 20, 1975 Viking 1-Mars Orbiter and Lander Mars Orbiter and Lander Jul 25, 1992 Mars Observer-Attempted Mars Orbiter (Contact Failure) Dec 4, 1996 Mars Pathfinder-Mars Lander and Rover Mars Lander and Rover Jan 3, 1999 Deep Space 2 (DS2)-Attempted Mars Penetrator Attempted Mars Penetrator Jan 3, 1999 Mars Polar Lander-Attempted Mars Lander Attempted Mars Lander Apr 7, 2001 2001 Mars Odyssey-Mars Orbiter Mars Orbiter Jun 10, 2003 Spirit (MER-A)-Mars Rover Mars Rover Aug 10, 2005 Mars Reconnaissance Orbiter-Mars Orbiter Mars Orbiter Aug 4, 2007 Phoenix-Mars Scout Lander Mars Scout Lander