InSight InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) is a NASA Discovery Program mission that will place a single geophysical lander on Mars to study its deep interior.
MER - Mars Exploration Rovers NASA's twin robot geologists, the Mars Exploration Rovers, launched toward Mars on June 10 and July 7, 2003, in search of answers about the history of water on Mars.
MRO - Mars Reconnaissance Orbiter NASA's Mars Reconnaissance Orbiter (MRO) launched in 2005 and is on a search for evidence that water persisted on the surface of Mars for a long period of time.
MSL - Mars Science Laboratory The Curiosity rover landed at Gale Crater on August 5, 2012. It is designed to search for and assess past or present habitable environments, i.e., those capable of supporting microbial life.
Mars Odyssey In its extended mission, Mars Odyssey continues to map chemical elements and minerals on the surface of Mars and to monitor changes at the surface for another Mars year.