Mars rover Mars rover A Mars rover is a motor vehicle that propels itself across the surface of the planet Mars upon arrival. Rovers have several advantages over stationary landers: they examine more territory, and they can be directed to interesting features, they can place themselves in sunny positions to weather winter months, and they can advance the knowledge of how to perform very remote robotic vehicle control. There have been four successful robotically operated Mars rovers. The Jet Propulsion Laboratory managed the "Sojourner" rover, the "Opportunity" rover, "Spirit" rover, and, now the "Curiosity" rover. On January 24, 2016 NASA reported that
Mars sample-return mission NASA and ESA called ExoMars, would launch in 2018 with unspecified missions to return the sample itself expected in the 2020–2022 time frame. The cancellation of the caching rover MAX-C and later NASA withdrawal from ExoMars, pushed back a sample-return mission to an undetermined date. Due to budget limitations the MAX-C mission, which was the first NASA-ESA mission leading to a MSR, was canceled in 2011 and the overall plan in 2012. The pull-out was described as "traumatic" for the science community. However, in April 2018, a letter of intent was signed by NASA and ESA that may provide a