Humphrey on the Inside

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

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 kickoff of a new Mars video series covers Opportunity's 14th anniversary on the Red Planet, Curiosity's spectacular panorama and ice deposits spotted by an orbiter.

This infographic highlights NASA’s twin robot geologists, the Mars Exploration Rovers (MER) Spirit and Opportunity.  The rovers landed on the Red Planet in 2004, in search of answers about the hist...

As Opportunity continued to traverse from "Erebus Crater" toward "Victoria Crater," the rover navigated along exposures of bedrock between large, wind-blown ripples.

This series of images shows simulated views of a darkening Martian sky blotting out the Sun from NASA’s Opportunity rover’s point of view, with the right side simulating Opportunity’s current view ...

NASA's Opportunity Mars rover, working on Mars since January 2004, passed marathon distance in total driving on March 24, 2015. This map shows the rover's entire traverse from landing to that point.

NASA's Mars Exploration Rover 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 (Oct. 31, 2010).

This is the Spirit panoramic camera's "Lookout" panorama, acquired on the rover's 410th to 413th martian days, or sols (Feb. 27 to Mar. 2, 2005).

A dust storm continues to envelop the Red Planet and Curiosity’s labs are back in action.

This May 29, 2016, image of a target called "Private Joseph Field" combines images from the microscopic imager on NASA's Mars Exploration Rover Opportunity with enhanced color information from the ...

The color image on the left was taken by the panoramic camera onboard the Mars Exploration Rover Opportunity shows the part of the rock outcrop dubbed Stone Mountain at Meridiani Planum, Mars.

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 10, 2018. The view is presented in false color to...

This self-portrait of NASA's Mars Exploration Rover Opportunity comes courtesy of the Sun and the rover's front hazard-avoidance camera.

This June 2017 stereo view from NASA's Opportunity Mars rover shows the area just above "Perseverance Valley" on the rim of a crater. It combines images from the left eye and right eye of the ro...

NASA's Mars Exploration Rover Spirit took this image of the region near "Husband Hill."

Wheel tracks from NASA's Mars rover Opportunity descending and departing the "Cape Tribulation" segment of Endeavour Crater's rim are visible in this April 21, 2017, view from the rover's Panoramic...

Born together, the Spirit and Opportunity twin rovers followed divergent paths after they landed on opposite sides of Mars. Opportunity’s journey was marked by good fortune, while Spirit’s was trou...

"Marathon Valley" on Mars opens to a view across Endeavour Crater in this scene from the Pancam of NASA's Mars rover Opportunity. The scene merges many exposures taken during April and May 2016. Th...

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

A team of about 50 men and women in white and blue cleanroom smocks and bonnets stand and sit around their creations: Spirit and Opportunity. The twin rovers of the Mars Exploration Rover mission...

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 Opportunity on March 3, 2004, during the 39th Martian day...

This scene from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity catches "Pillinger Point," on the western rim of Endeavour Crater, in the foreground. The eastern rim of t...

Landing a spacecraft on Mars is one of the trickiest things we do. This 60-second video explains how it's done, and the three landing systems we use at the Red Planet.

This image from the panoramic camera on NASA's Mars Exploration Rover Opportunity shows a rock called "Chocolate Hills," which the rover found and examined at the edge of a young crater called "Con...