This image is a cropped version of the last 360-degree panorama taken by the Opportunity rover's Panoramic Camera (Pancam) from May 13 through June...

This June 2017 view from the Pancam on NASA's Opportunity Mars rover shows the area just above "Perseverance Valley" on a large crater's ...

NASA's Opportunity Mars rover passed near this small, relatively fresh crater in April 2017, during the 45th anniversary of the Apollo 16 mission t...

The Pancam on NASA's Opportunity Mars rover imaged this small, relatively fresh crater in April 2017, during the 45th anniversary of the Apollo 16 ...

This May 29, 2016, image of a target called "Private Joseph Field" combines images from the microscopic imager on NASA's Mars Exploration R...

This Sept. 21, 2016, scene from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity shows "Spirit Mound" overlooking...

"Marathon Valley" on Mars opens to a view across Endeavour Crater in this enhanced-color version of a scene from the Pancam of NASA's Mars ...

From its perch high on a ridge, NASA's Mars Exploration Rover Opportunity recorded this image of a Martian dust devil twisting through the valley b...

This scene from NASA's Mars Exploration Rover Opportunity looks upward at "Knudsen Ridge" on the southern edge of "Marathon Valley"...

These small spherules on the Martian surface are near Fram Crater, visited by NASA's Mars Exploration Rover Opportunity during April 2004. The area...

On March 20, 2004, NASA's Mars Exploration Rover Opportunity used a wheel to dig a trench revealing subsurface material beside the lander hardware ...

This panorama is the view NASA's Mars Exploration Rover Opportunity gained from the top of the "Cape Tribulation" segment of the rim of End...

NASA's Mars Exploration Rover Opportunity is continuing its traverse southward on the western rim of Endeavour Crater during the fall of 2014, stop...

This close-up view of a target rock called "Last Chance" was acquired by the microscopic imager on the arm of NASA's Mars Exploration Rover...

This north-looking vista from NASA's Mars Rover Opportunity shows Wdowiak Ridge, from left foreground to center. This version is presented in false...

This vista from NASA's Mars Exploration Rover Opportunity shows "Wdowiak Ridge," from left foreground to center, as part of a northward loo...

This Aug. 15, 2014, scene from the Pancam on NASA's Mars Exploration Rover Opportunity looks back toward part of the west rim of Endeavour Crater t...

This false-color view from NASA's Mars Exploration Rover Opportunity shows "Lunokhod 2 Crater," which lies south of Solander Point on the w...

This May 14, 2014, scene from the Pancam on NASA's Mars Exploration Rover Opportunity catches "Pillinger Point," on the western rim of Ende...

This vista of the Endeavour Crater rim was acquired by NASA's Mars Exploration Rover Opportunity's panoramic camera on April 18, 2014, from "Mu...

A self-portrait of NASA's Mars Exploration Rover Opportunity taken in late March 2014 (right) shows that much of the dust on the rover's solar arra...

NASA's Mars Exploration Rover Opportunity caught its own silhouette in this late-afternoon image taken by the rover's rear hazard avoidance camera ...

This false color image suggests that the plains beyond the small crater where the Mars Exploration Rover Opportunity now sits are littered with the...

Opportunity used its panoramic camera (Pancam) to acquire this view of "Solander Poin." The southward-looking scene, presented in false col...

This full-circle scene combines 817 images taken by the panoramic camera (Pancam) on Opportunity.

NASA's Mars Rover Opportunity catches its own late-afternoon shadow in this dramatically lit view eastward across Endeavour Crater on Mars.

Opportunity used its panoramic camera to record this eastward horizon view on the 2,407th Martian day, or sol, of the rover's work on Mars (October...

This self-portrait from Opportunity shows dust accumulation on the rover's solar panels as the mission approached its fifth Martian winter.

"Intrepid" crater on Mars carries the name of the lunar module of NASA's Apollo 12 mission, which landed on Earth's moon Nov. 19, 1969.

Opportunity used its navigation camera for this northward view of tracks the rover left on a drive from one energy-favorable position on a sand rip...

This view of a rock called "Block Island," the largest meteorite yet found on Mars.

During four months prior to the fourth anniversary of its landing on Mars, Opportunity examined rocks inside an alcove called "Duck Bay" in...

This view from Opportunity shows the tracks left by a drive executed with more onboard autonomy than has been used on any other drive by a Mars rover.

NASA's Mars Exploration Rover Opportunity captured a view of wispy afternoon clouds, not unlike fair weather clouds on Earth, passing overhead on t...

Opportunity captured this vista of "Victoria Crater" from the viewpoint of "Cape Verde," one of the promontories that are part of t...

As part of its investigation of "Victoria Crater," Opportunity examined a promontory called "Cape Verde" from the vantage point of ...

"Victoria Crater," about 800 meters (one-half mile) in diameter, has been home ground for NASA's Mars Exploration Rover Opportunity for mor...

As Opportunity continued to traverse from "Erebus Crater" toward "Victoria Crater," the rover navigated along exposures of bedrock ...

This view combines frames taken by the panoramic camera on Opportunity's 652nd through 663rd Martian days, or sols (Nov. 23 to Dec. 5, 2005), at th...

This is the Opportunity "Erebus Rim" panorama, acquired on sols 652 to 663 (Nov. 23 to Dec. 5, 2005 ), as Opportunity was exploring sand du...

This image shows a portion of the rim of "Erebus Crater" in the Meridiani Planum region of Mars.

These images of a sand "ripple" were acquired by Opportunity using its panoramic camera on sol 644 and its navigation camera on sol 645.

This false-color panoramic image, taken on martian day, or sol, 561 (Aug. 22, 2005) by the Opportunity rover, shows the nature of the outcrop rocks...

This panoramic image, dubbed "Rub al Khali," was taken by Opportunity on the plains of Meridiani during the rover's 456th to 464th sols on ...

Opportunity's wheels dug more than 10 centimeters (4 inches) deep into the soft, sandy material of a wind-shaped ripple in Mars' Meridiani Planum r...

Opportunity used its panoramic camera to take the images combined into this mosaic view of the rover.

This stunning image features the heat shield impact site of NASA's Mars Exploration Rover Opportunity.

Since landing on Mars a year ago, NASA's pair of six-wheeled geologists have been constantly exposed to martian winds and dust.

Opportunity found an iron meteorite on Mars, the first meteorite of any type ever identified on another planet.

This image from Opportunity's panoramic camera features the remains of the heat shield that protected the rover from temperatures of up to 2,000 de...