Humphrey on the Inside

This stereo vista from NASA's Mars Exploration Rover Opportunity shows "Wdowiak Ridge," from left foreground to center, as part of a northward look with the rover's tracks visible at right. The ima...

This 3-D cylindrical-perspective projection was constructed from a sequence of four images taken by the navigation camera onboard the Mars Exploration Rover Opportunity. The images were acquired...

NASA's Mars Exploration Rover Opportunity captured a view of wispy afternoon clouds, not unlike fair weather clouds on Earth, passing overhead on the rover's 956th sol, or Martian day (Oct. 2, 2006).

As NASA's Mars Exploration Rover Opportunity neared the ninth anniversary of its landing on Mars, the rover was working in the 'Matijevic Hill' area seen in this stereo view from Opportunity's pano...

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

Mars Exploration Rover parachute deployment testing

As Opportunity crept farther into "Endurance Crater," the dune field on the crater floor appears even more dramatic, as seen in this false-color image.

How can you communicate with Mars spacecraft when the Sun is in the way? Learn more about 'solar conjunction' in this 60-second video.

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.

Eleven years and two months after its landing on Mars, the total driving distance of NASA's Opportunity Mars rover surpassed the length of a marathon race: 26.219 miles (42.195 kilometers). This ma...

NASA's Mars rover Opportunity edged 3.7 meters (12 feet) closer to the top of the "Duck Bay" alcove along the rim of "Victoria Crater" during the rover's 952nd Martian day, or sol (overnight Sept. ...

This image from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity shows where a rock called "Pinnacle Island" had been before it appeared in front of the rover in early Jan...

This graphic shows the route that NASA's Mars Exploration Rover Opportunity drove in its final approach to "Perseverance Valley" on the western rim of Endeavour Crater during spring 2017.

This image shows rocky debris and dust, which planetary scientists call "regolith" or "soil," that has been churned up by the rover wheels.

The rover launch site at Cape Canaveral, Florida is the "Lightning Capital of the United States." Launching a spacecraft safely is challenging enough. Learn how the Force of Nature intercepted the ...

The pointy features, dubbed "Razorback," in this image may only be a few centimeters high but they generate major scientific interest.

The boulder-studded ridge in this scene recorded by NASA's Mars Exploration Rover Opportunity is "McClure-Beverlin Escarpment," informally named for Jack Beverlin and Bill McClure, engineers who on...

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

Episode one launches with Jennifer Trosper in the driver’s seat. As she looks in the rearview mirror at twenty-five years of exploring with NASA’s Mars rovers, she reveals how their progression has...

This synthetic image of the Spirit Mars Exploration Rover in the "Columbia Hills" was produced using "Virtual Presence in Space" technology.

This animation features the Mars Exploration Rover's entry into the martian atmosphere and final soft landing using airbags. (Audio: mechanical sounds only)

This artist's rendering depicts NASA's Mars Exploration Rovers, Spirit and Opportunity. The twin rovers were launched in 2003 and arrived on Mars in January 2004.

This false color image suggests that the plains beyond the small crater where the Mars Exploration Rover Opportunity now sits are littered with the same dark grey material found inside the crater i...

This artist's illustration shows NASA's four successful Mars rovers (from left to right): Sojourner, Spirit and Opportunity, and Curiosity. The image also shows the upcoming Mars 2020 rover and a h...

Steve Squyres, principal investigator for NASA’s Mars Exploration Rover mission, and Matt Golombek, the mission’s project scientist, discussed the ground-breaking science returned by the mission’s ...