NASA is trying one last time to contact its record-setting Mars rover Opportunity, before calling it quits.

The rover has been silent for eight months, victim of an intense dust storm. Thick dust darkened the sky last summer and, for months, blocked sunlight from the spacecraft’s solar panels.

NASA said Tuesday it will issue a final series of recovery commands. If there’s no response by Wednesday — which NASA suspects will be the case — Opportunity will be declared dead, 15 years after arriving at Mars. The rover is the longest-lasting lander on the red planet.

Team members are already looking back at Opportunity’s achievements, including confirmation that water once flowed on Mars. Besides endurance, the six-wheeled rover set a roaming record of 28 miles (45 kilometers.)

FILE - This photo released Thursday, Feb. 5, 2004 made by one of the rear hazard-avoidance cameras on NASA's Opportunity rover, shows Opportunity's landing platform, with freshly made tracks leading away from it. (NASA/JPL via AP)
FILE – This photo released Thursday, Feb. 5, 2004 made by one of the rear hazard-avoidance cameras on NASA’s Opportunity rover, shows Opportunity’s landing platform, with freshly made tracks leading away from it. (NASA/JPL via AP)
FILE - This composite of March 2015 photos made available by NASA shows a shallow crater called Spirit of St. (34 meters) long and about 80 feet (24 meters) wide, with a floor slightly darker than surrounding terrain. The rocky feature toward the far end of the crater is about 7 to 10 feet (2 to 3 meters) tall, rising higher than the crater's rim. (NASA/JPL-Caltech/Cornell University/Arizona State University via AP)
FILE – This composite of March 2015 photos made available by NASA shows a shallow crater called Spirit of St. (34 meters) long and about 80 feet (24 meters) wide, with a floor slightly darker than surrounding terrain. The rocky feature toward the far end of the crater is about 7 to 10 feet (2 to 3 meters) tall, rising higher than the crater’s rim. (NASA/JPL-Caltech/Cornell University/Arizona State University via AP)
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