This color image shows the martian landscape at Meridiani Planum, where the Mars Exploration Rover Opportunity successfully landed on Saturday. (Xinhua/AFP) 

    This image taken by the Mars Exploration Rover Opportunity's panoramic camera shows where the rover's airbags left impressions in the martian soil. (Xinhua/AFP)

    This image shows one of the Mars Exploration Rover Opportunity's first views of the martian soil after its successful landing at Meridiani Planum on Mars. (Xinhua/AFP)