NASA’s longest-running rover on Mars, Opportunity, has been pronounced dead, 15 years after it landed on the red planet.

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

Opportunity Outlived Expectations

Its identical twin, Spirit, was pronounced dead in 2011, a year after it got stuck in sand and communication ceased.

Both outlived and outperformed expectations, on opposite sides of Mars. The golf cart-size rovers were designed to operate as geologists for just three months, after bouncing onto our planetary neighbor inside cushioning air bags in January 2004. They rocketed from Cape Canaveral a month apart in 2003.

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‘Opportunity, A WorkHorse’

“It’s just like a loved one who’s gone missing, and you keep holding out hope that they will show up and that they’re healthy,” he said. “But each passing day that diminishes, and at some point you have to say ‘enough’ and move on with your life.”

Deputy project scientist Abigail Fraeman was a 16-year-old high school student when Opportunity landed on Mars; she was inside the control center as part of an outreach program. Inspired, Fraeman went on to become a planetary scientist, joined NASA’s Jet Propulsion Laboratory in Pasadena, California, and ended up deputy project scientist for Opportunity.

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NASA last heard from Opportunity on 10 June. Flight controllers tried to awaken the rover, devising and sending command after command, month after month. The Martian skies eventually cleared enough for sunlight to reach the rover’s solar panels, but there was still no response. Now it’s getting colder and darker at Mars, further dimming prospects.

Engineers speculate the rover’s internal clock may have become scrambled during the prolonged outage, disrupting the rover’s sleep cycle and draining on-board batteries. It’s especially frustrating, according to Callas, not knowing precisely why Opportunity – or Spirit – failed.

As for Opportunity, “It has given us a larger world,” Callas said. “Mars is now part of our neighborhood.”

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