6th Year Anniversary Graphic

An elongated crater called "Spirit of St. Louis," with a rock spire in it, dominates a recent scene from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity.

This section from a panorama that NASA's Mars Exploration Rover Spirit acquired in October 2005 from the top of "Husband Hill" presents the view toward the south from that summit.

Mars Exploration Rover parachute deployment testing in the world's largest wind tunnel at NASA's Ames Research Center, Moffet Field, Calif.

NASA's Mars Exploration Rover Opportunity has been on the western rim of Endeavour Crater in Meridiani Planum for about two years.

This is a look inside a soil trench or drift dubbed 'Serpent' after the rover successfully dug into the side of the drift.

This graphic compares atmospheric opacity in different Mars years from the point of view of NASA’s Opportunity rover. 

This illustration depicts some highlights along the route as NASA's Mars Exploration Rover Opportunity drove as far as a marathon race during the first 11 years and two months after its January 200...

This image shows the rock dubbed "Humphrey" and the circular areas on the rock that were wiped off by the rover.

The "Lion King" panorama was the largest panorama obtained by either rover in 2004.

This expansive view of the martian real estate surrounding the Mars Exploration Rover Opportunity is the first 360 degree, high-resolution color image taken by the rover's panoramic camera.

This scene from NASA's Mars rover Opportunity shows "Wharton Ridge," on the western rim of Endeavour Crater. The ridge's name honors the memory of astrobiologist Robert A. Wharton (1951-2012). The ...

This cylindrical-projection view was created from navigation camera images that NASA's Mars Exploration Rover Spirit acquired on sol 122 (May 7, 2004).

NASA's Mars Exploration Rover Opportunity recorded this view of a crater informally named "Freedom 7" shortly before the 50th anniversary of the first American in space: astronaut Alan Shepard's fl...

NASA's Mars Exploration Rover Opportunity has extended its robotic arm for studying a light-toned rock target called "Athens" in this March 25, 2015, image from the rover's front hazard avoidance c...

The "keys" to NASA's Mars rovers are in the capable hands of the official rover drivers. Learn how they operate the vehicles from millions of miles away in this 60-second video from NASA's Jet Prop...

Rover team members with rover.

After bouncing to a stop, the lander's petals unfold and the Mars Exploration Rover drives onto the surface of Mars.

Scientists and engineers working on NASA’s Mars Exploration Rover mission gather for a team portrait during the rovers’ prime mission on Mars in 2004 at NASA’s Jet Propulsion Laboratory in Pasadena...

This March 21, 2016, image from the navigation camera on NASA's Mars rover Opportunity shows streaks of dust or sand on the vehicle's rear solar panel after a series of drives during which the rove...

Researchers created each of 11 pieces in the 3D printer and glued them together to build the true-size model.

The cruise stage provides power, communication and propulsion for the rover and lander within its cocoon made up of the heatshield and backshell for the cruise to Mars.

Textured rows on the ground in this portion of "Perseverance Valley" are under investigation by NASA's Mars Exploration Rover Opportunity, which used its Navigation Camera to take the component ima...

Take JPL Education's Pi Day challenge featuring real-world questions about NASA spacecraft -- then tweet your answers to @NASAJPL_Edu using the hashtag #PiDay. Answers will be revealed on March 16.

Opportunity captured this view of "Burns Cliff" after driving right to the base of this southeastern portion of the inner wall of "Endurance Crater."

Engineers for NASA's Mars Exploration Rover Mission are completing assembly and testing for the twin robotic geologists at JPL.