Opportunity:
Opportunity found the strongest evidence yet that liquid water once existed on the surface of Mars. Scientists believe the rover's Meridiani Planum landing site "was once the shoreline of a salty sea on Mars."

Like its sister rover - Spirit - Opportunity is a full-equipped robot geologist. Both rovers are packed with sensors and cameras that have been revealing Mars in unprecedented detail from microscopic images of rocks to panoramic views of the rocky landscape.

Both rovers are still functioning on Mars. Spirit is exploring the Gusev Crater area on the opposite side of the planet.

Visit the Opportunity Website

07.07.03:  Launch (23:18:15 EDT) 01.24.04:  Mars Landing (9:05 PM PST) Status:  Extended Mission on Mars Show All Dates for Opportunity		Meet Joy Crisp Dr. Joy Crisp is chasing down the rocky secrets of Mars as a leader on the Mars Exploration Rovers mission. Meet More Space Explorers
Opportunity traveled roughly 491 million km (305 million miles) on its journey to Mars. On the surface, the rover moves at a top speed of 5 cm (2 inches) per second. Opportunity's panoramic camera will reveal Mars at about the same height as an adult person. Both rovers carry a unique camera calibration target in the shape of a sundail (pictured above).		08.26.08:  NASA's Mars Rover Opportunity Climbing out of Crater 04.23.08:  Shoulder Motor Balks on Opportunity Rover's Robotic Arm 02.15.08:  Mars Rovers Sharpen Questions About Livable Conditions More Headlines Solar System Bodies: Mars Opportunity Multimedia Gallery Mars Exploration Program Athena: Cornell Mars Rovers Website Mars Exploration Rovers Press Kit (June 2003)