The Opportunity rover landed on Mars eleven Earth calendar years ago today, and it still works fine after driving ~42 km! This is the farthest any off-planet vehicle has gone so far. Oppy’s mate Spirit was mobile on the Red Planet for over five years and then functioned as a stationary science platform for another year before getting killed off by a Martian winter it couldn’t avoid. Amazing engineering that keeps working year after year without a technician so much as touching it.
At the moment Oppy is still exploring the rim of Endeavour crater, where it’s spent several years. The rover recently broke its altitude record when scaling the high part of the rim known as Cape Tribulation. It is now headed towards a promising geological site known as “Marathon Valley” — because Oppy has almost run a marathon by now. Check out the project’s web site for news!