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How long did Opportunity operate on Mars?
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Mars
An especially serene view of Mars (Tharsis side), a composite of images taken by the Mars Global Surveyor spacecraft in April 1999. The northern polar cap and encircling dark dune field of Vastitas Borealis are visible at the top of the globe. White water-ice clouds surround the most prominent volcanic peaks, including Olympus Mons near the western limb, Alba Patera to its northeast, and the line of Tharsis volcanoes to the southeast. East of the Tharsis rise can be seen the enormous near-equatorial gash that marks the canyon system Valles Marineris.
The Mars Exploration Rover Opportunity operated on Mars for 14 years.1
Although the rover was originally designed for a nominal 90-day mission, it far exceeded expectations, continuing its exploration until a planetwide dust storm led to its final transmission on June 10, 2018. NASA officially declared the mission over in February 2019 after failing to reestablish contact. During its tenure, Opportunity set records for both distance traveled, covering 45 km (28 miles), and total mission time spent on another planet.1