Mars Exploration Rovers: Spirit & Opportunity Key Ring

NASA's Mars Exploration Rover Mission (MER) is an ongoing robotic space mission involving two rovers, Spirit and Opportunity, exploring the planet Mars. It began in 2003 with the sending of the two rovers—MER-A Spirit and MER-B Opportunity—to explore the Martian surface and geology. The mission's scientific objective was to search for and characterise a wide range of rocks and soils that hold clues to past water activity on Mars. The mission is part of NASA's Mars Exploration Program, which includes three previous successful landers: the two Viking program landers in 1976 and Mars Pathfinder probe in 1997. The total cost of building, launching, landing and operating the rovers on the surface for the initial 90-Martian-day (sol) primary mission was $820 million. Since the rovers have continued to function beyond their initial 90 sol primary mission, they have each received numerous mission extensions. Spirit was declared unresponsive in 2011, but Opportunity continues to function 10 years beyond its 90 day expected life! We do special orders and customisation and its always free. We are officially licensed by NASA!! Want a NASA, JPL or ESA logo on the back or inside of a a product??