Opportunity rover

The shadow of a Martian robot, the Opportunity rover, currently exploring the red planet.

Opportunity has been exploring Mars since early 2004, finding evidence of ancient water, and sending breathtaking images across the inner Solar System.



Pictured above in 2004, Opportunity looks opposite the Sun into Endurance Crater and sees its own shadow. Two wheels are visible on the lower left and right, while the floor and walls of the unusual crater are visible in the background. Opportunity is continuing on its long trek exploring unusual terrain in Meridiani Planum which continues to yield clues to the ancient history of Mars, our Solar System, and even humanity.

source APOD