(PhysOrg.com) -- The Mars rover Opportunity, which has just crawled out of the 800-meter-wide (875 yards) Victoria Crater is setting out on the longest journey of its life. It will take the rover roughly two years of driving at its top speed -- up to 100 meters (109 yards) a day -- to reach its new target, a crater 20 times the size of Victoria that the Mars Exploration Rover team has unofficially dubbed "Endeavour."