NASA Mars rover
Opportunity, also known as MER-B or MER-1, is a robotic rover that was active on Mars from 2004 through 2019. Launched on July 7, 2003 as part of NASA's Mars Exploration Rover program, it landed in Meridiani Planum on January 25, 2004, three weeks after its twin Spirit (MER-A) touched down on the other side of the planet. With a planned 90 sol duration of activity, Spirit functioned until getting stuck in 2009 and ceased communications in 2010, while Opportunity was able to stay operational for 5351 sols since landing, exceeding its operating plan by 14 years, 293 days, 55 times its designed lifespan. As of June 10, 2018, when contact was lost, the rover had traveled a distance of 45.16 kilometers.
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