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The Mars Opportunity Rover, nicknamed Oppy, sent it's last message "My battery is low and it's getting dark" on 20 June 2018.

Designed to last just 90 Martian days and travel 1,000 meters, Opportunity vastly surpassed all expectations in its endurance, scientific value and longevity. In addition to exceeding its life expectancy by 60 times, the rover traveled more than 45 kilometers by the time it reached its most appropriate final resting spot on Mars.