Humphrey on the Inside

Navigators must safely maneuver Spirit and Opportunity to their precise atmospheric entry points to reach their landing targets on the surface of Mars. In only six minutes, the spacecraft must slow...

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

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

Download a PDF of the 2019 - 2020 Mars Calendar.

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

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

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...

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 ...

In February 2015, NASA's Mars Exploration Rover Opportunity is approaching a cumulative driving distance on Mars equal to the length of a marathon race. This map shows the rover's position relative...

NASA's Mars Exploration Rover Opportunity set a one-day distance record for martian driving on the rover's 383rd martian day, or sol, which began on Feb. 19, 2005. Opportunity rolled 177.5 meters (...

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

"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.

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

On the 3,309th Martian day, or sol, of its mission on Mars (May 15, 2013) NASA's Mars Exploration Rover Opportunity drove 263 feet (80 meters) southward along the western rim of Endeavour Crater.

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...

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...

This synthetic image of the Spirit Mars Exploration Rover on the flank of "Husband Hill" was produced using "Virtual Presence in Space" technology.

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 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...

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 ...

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.

Find out how the Mars Exploration Rover team traversed the Red Planet, examined the diverse environment and transformed our understanding of Mars.

This June 2017 view from the Pancam on NASA's Opportunity Mars rover shows the area just above "Perseverance Valley" on the western rim of Endeavour Crater. Color has been enhanced to make diffe...

The left image shows an extreme close-up of round, blueberry-shaped formations in the martian soil near a part of the rock outcrop at Meridiani Planum called Stone Mountain.

This 360-degree view, called the "McMurdo" panorama, comes from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Spirit. From April through October 2006, Spirit has stayed on a small ...