astroengine writes: After nine years of hard Mars roving, Mars Exploration Rover (MER) Opportunity has broken a 40-year-old extraterrestrial distance record. On Thursday, the tenacious six-wheeled robot drove 80 meters (263 feet), nudging the total distance traveled since landing on the red planet in 2004 to 35.760 kilometers (22.220 miles). NASA’s previous distance record was held by Apollo 17 astronauts Eugene Cernan and Harrison Schmitt when, in December 1972, they drove their Lunar Roving Vehicle 35.744 kilometers (22.210 miles) over the lunar surface. Although it's broken the NASA distance record, it hasn't surpassed the international record, yet. The Soviet Lunokhod 2 remote-controlled moon rover roved 37 kilometers (23 miles) across the lunar surface and, so far, remains the undisputed champion of distance driving on an extraterrestrial surface.