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...

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...

During the three-year trek of NASA's Mars Rover Opportunity from Victoria crater to Endeavour crater, rover planners captured a horizon photograph at the end of each drive. 309 images taken during ...

NASA's Opportunity Mars rover passed near this small, relatively fresh crater in April 2017, during the 45th anniversary of the Apollo 16 mission to the moon. The rover team chose to call it "Orion...

The first episode documents the hurdles leading up to both launches. From Mother Nature being uncooperative to a problem with the cork insulation on the rocket, lift-off was no small feat. Ultimate...

This 360-degree stereo anaglyph of the terrain surrounding NASA's Mars Exploration Rover Opportunity was taken on the rover's 171st sol on Mars (July 17, 2004).

This image highlights the bumpy terrain surrounding the rover.

Cindy Oda stood up to share her experience working with NASA’s Opportunity rover during a team meeting in Mission Control at NASA’s Jet Propulsion Laboratory in Pasadena, California.

The Mars Exploration Rover-2 is moved to a workstand in the Payload Hazardous Servicing Facility.

This image taken at Meridiani Planum, Mars, by the panoramic camera on the Mars Exploration Rover Opportunity shows the rover's Moessbauer spectrometer (circular device in center), located on its i...

See how the scientists and engineers on Earth stretch their imaginations to design the best rover system to deal with the unpredictable dangerous terrain on Mars. Rover team members at Jet Propulsi...

NASA's Mars Exploration Rover Opportunity recorded this stereo view of a crater informally named "Freedom 7" shortly before the 50th anniversary of the first American in space: astronaut Alan Shepa...

Download a PDF of the 2013 - 2014 Mars Calendar.

This graph compares the elemental composition of typical soils at three landing regions on Mars.

NASA's twin robot geologists, the Mars Exploration Rovers, will launch toward Mars in 2003 in search of answers about the history of water on Mars. The rovers will be targeted to sites that appear ...

These side-by-side images were taken by the Pan Camera (Pancam) on NASA's Opportunity rover. They're actually the same image; the left version is how the image originally came down, due to data dro...

If a human with perfect vision donned a spacesuit and stepped onto the martian surface, the view would be as clear as this sweeping panorama taken by Spirit.

A region known as "Cape York" on the western rim of Endeavour Crater, where NASA's Mars Exploration Rover Opportunity worked for 20 months, is highlighted in these images.

The component images for this 360-degree panorama were taken by the navigation camera on NASA's Mars Exploration Rover Opportunity after the rover drove about 97 feet (29.5 meters) during the missi...

NASA's Mars Exploration Rover Opportunity captured this view after beginning to ascend the northwestern slope of "Solander Point" on the western rim of Endeavour Crater.

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...

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

At an event celebrating the end of NASA’s Mars Exploration Rovers (MER) mission on Feb. 13, 2019, engineer Jennifer Trosper shared how working on the rovers Spirit and Opportunity taught her lesson...

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

Members of the Mars Exploration Rovers Assembly, Test and Launch Operations team gather around Rover 2 and its predecessor, a flight spare of the Pathfinder mission's Sojourner rover, named Marie C...