Mars rover to regain contact. Mars 2, Mars 3 were physically tethered probes; "Sojourner" was dependent on the Mars Pathfinder base station for communication with Earth; MER-A & B and "Curiosity" were on their own. Of these "Curiosity" is still active, and "Spirit", "Opportunity" and "Sojourner" completed their missions before losing contact. Seven rovers have been dispatched to Mars: "Examples Landed instrumentation" (Rovers) Mars rovers in development include: One experimental design, not proposed for any actual mission, is: NASA distinguishes between "mission" objectives and "science" objectives. Mission objectives are related to progress in space technology and development processes. Science objectives are met
Yellowknife Bay, Mars The crater's central feature is a mountain called Aeolis Mons, nicknamed Mount Sharp. Geologic units in the interior of the crater offer a wide range of relative ages of the impact and provide a detailed geologic history of activities within the crater. Gale Crater is the landing site of the Mars Science Laboratory rover, which was launched from Cape Canaveral on November 26, 2011 and landed at the site designated Bradbury Landing on August 6, 2012. The rover is equipped with a more advanced suite of instruments than has ever landed on an extraterrestrial planet, perfect for assessing the geology