ESA engineers have figured out how to extend the life of SMART-1's ion engine, giving the mission more time to orbit the Moon. The mission was originally supposed to end in May 2006, but by conserving fuel and changing the way it engine operates, the engineers have pushed its demise back to July 2006. SMART-1 is completely out of fuel now, though, and will coast until its decaying orbit smashes it into the Moon.