Google Lunar Challenge is awarded to the first team that can land a rover on the moon by hand . Rover must travel on the lunar surface for at least 500 meters , send back images . There are 13 teams officially competing in the race ; it is expected to grow . The mission will probably cost much more than the $ 1 million first prize .
Google Lunar X Prize goes to the first team that can land a rover on the moon by 2012 . Rover must travel on the lunar surface for at least 500 meters , send back images . There are 13 teams officially competing in the race ; number is expected to grow . The mission will probably cost much more than the $ 20 million first prize .