Humphrey on the Inside

Road trip! This compilation of images from hazard-avoidance cameras on NASA's Mars Exploration Rover Opportunity between January 2004 and April 2015 shows the rover's-eye-view of the Martian marath...

NASA's Mars Exploration Rover Opportunity is continuing its traverse southward on the western rim of Endeavour Crater during the fall of 2014, stopping to investigate targets of scientific interest...

Rover team members with rover.

NASA's Mars Exploration Rover Opportunity has been working on Mars since landing inside Eagle Crater on Jan. 25, 2004 (Universal Time; evening of Jan. 24, Pacific Standard Time).

Download a PDF of the Mars Exploration Rover Fact Sheet.

During a team meeting for NASA’s Opportunity rover, Ben Cark of the Space Science Institute talks about his experiences working on NASA’s longest-lived Mars surface explorer. 

With the parachute deployed, three retrorockets fire their engines, suspending the lander 30 - 50 feet above the Martian surface.

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...

This view from within "Perseverance Valley," on the rim of Endurance Crater, includes wheel tracks from the Opportunity Mars rover's descent of the valley to investigate its origin. The rover's Pan...

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.

Cumulative driving by NASA's Mars Exploration Rover Opportunity surpassed marathon distance on March 24, 2015, as the rover neared a destination called "Marathon Valley," which is middle ground of ...

This stereo view was taken by the panoramic camera on NASA's Mars Exploration Rover Spirit on the rover's 87th martian day, or sol (April 1, 2004), just after Spirit left "Bonneville Crater." It sh...

In this selfie, Spirit shows her solar panels gleaming in the Martian sunlight and carrying only a thin veneer of dust two years after the rover landed and began exploring the red planet.

This image highlights the bumpy terrain surrounding the rover.

An artist's concept portrays a NASA Mars Exploration Rover on the surface of Mars.

With a model of NASA's Opportunity rover behind him, John Callas, project manager of the Spirit and Opportunity Mars rovers, speaks about the rovers' achievements at the agency's Jet Propulsion Lab...

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...

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

This stereo scene from NASA's Mars Exploration Rover Opportunity shows "Spirit Mound" overlooking the floor of Endeavour Crater. The view appears three-dimensional when seen through blue-red glasse...

This image taken by the panoramic camera onboard Opportunity shows the rover's now-empty lander, the Challenger Memorial Station, at Meridiani Planum, Mars.

On Earth, a fast runner takes a few hours to complete a marathon. On Mars, it's taken 11 years. NASA's Opportunity rover crossed that finish line in 2015.

Team members reflect on Spirit's six-years of roving 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 31, 2010).

NASA's Mars Exploration Rover Spirit has been making tracks on Mars for seven months now, well beyond its original 90-day mission. The rover traveled more than 3 kilometers (2 miles) to reach the "...

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