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...

An artist's concept portrays a NASA Mars Exploration Rover on the surface of Mars. Two rovers have been built for 2003 launches and January 2004 arrival at two sites on Mars. Each rover has the mob...

Download a PDF of the Spirit Poster.

The designated landing site for the second Mars Exploration Rover mission is Meridiani Planum, seen here in its geological context from NASA Viking images.

Details of the Meridiani Planum designated landing site are added with topographic information and higher-resolution imaging from instruments on the Mars Global Surveyor and Mars Odyssey orbiters.

A rock with a white edge and a red center reminds us of a jelly donut in a box from the local donut shop in this image taken by Opportunity on February 4, 2014. Named “pinnacle Island” by Opportun...

Interact with this 3D model of a Mars Exploration Rover.

This late-afternoon view from the front Hazard Avoidance Camera on NASA's Mars Exploration Rover Opportunity shows a pattern of rock stripes on the ground, a surprise to scientists on the rover tea...

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...

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...

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

NASA's Mars Exploration Rover Opportunity used its navigation camera to capture the component images for this 360-degree view near the ridgeline of Endeavour Crater's western rim.

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...

A round of applause at NASA's Jet Propulsion Laboratory in Pasadena, California, for a successful end to the mission of NASA's Opportunity Mars rover on Feb. 13, 2019.

Spirit used its microscopic imager to capture these spectacular, jagged mini-landscape on a rock called "GongGong." Wind has deposited sand and dust in the holes and crevices of the rock.

Opportunity used its panoramic camera to take the images combined into this mosaic view of the rover.

From its perch high on a ridge, NASA's Mars Exploration Rover Opportunity recorded this image of a Martian dust devil twisting through the valley below.

This is one of the first images beamed back to Earth shortly after the Mars Exploration Rover Spirit landed on the red planet.

This synthetic image recreates what Opportunity might look like in Endurance Crater. Produced using "Virtual Presence in Space" technology at NASA's Jet Propulsion Laboratory, it combines visualiza...

Researchers used the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity to capture this view of comet C/2013 A1 Siding Spring as it passed near Mars on Oct. 19, 2014.

NASA's Opportunity rover appears as a blip in the center of this square. This image taken by HiRISE, a high-resolution camera onboard NASA's Mars Reconnaissance Orbiter, shows the dust storm over P...

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...

This mosaic 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

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...

Divide and conquer: combining 11 small sections of "Block Island" (the color map shows five of the sections).