Humphrey on the Inside

Opportunity found an iron meteorite on Mars, the first meteorite of any type ever identified on another planet.

This image hows several dust devils moving from right to left across a plain inside Mars' Gusev Crater, as seen from the vantage point of NASA's Mars Exploration Rover Spirit in hills rising from t...

The close camaraderie among scientists and engineers who worked on NASA’s Opportunity rover is evident in this image from Feb. 12, 2019, at NASA’s Jet Propulsion Laboratory in Pasadena, California.

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...

The deck of NASA's Mars Exploration Rover Spirit is so dusty that the rover almost blends into the dusty background in this image assembled from frames taken by the panoramic camera (Pancam) during...

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

Download a PDF of the 2013 - 2014 Mars Calendar.

This view of a 90-foot-wide, relatively fresh crater on Mars, "Orion Crater," combines images from the left eye and right eye of the Panoramic Camera (Pancam) on NASA's Mars Exploration Rover Oppor...

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

A self-portrait of NASA's Mars Exploration Rover Opportunity taken by the rover's panoramic camera (Pancam) in late March 2014 shows effects of recent winds removing much of the dust from the rover...

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 is the 3-D anaglyph showing a microscopic image taken of soil featuring round, blueberry-shaped rock formations on the crater floor at Meridiani Planum, Mars. This image was taken on the 13th ...

See how Mars Exploration Rover team members take on the demands of driving a rover millions of miles away from Earth.

More than 1.5 years into their exploration of Mars, both of NASA's Mars Exploration Rovers continue to send a cornucopia of images to Earth.

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).

Rover 2 is driven over staggered ramps to test the suspension's range of motion.

Overhead and on-the-ground views of the 25-mile journey NASA's Opportunity Mars rover has made since landing in 2004. (No audio)

In this navigation camera raw image, NASA's Opportunity Rover looks back over its own tracks on Aug. 4, 2010. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, manages the Mars E...

Women working in science, technology, engineering and mathematics at NASA's Jet Propulsion Laboratory pose for a photo in mission control in honor of Women in Science Day.

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.

6th Year Anniversary Graphic

This image shows segments of the western rim of Mars' Endeavour Crater. NASA's Mars rover Opportunity has explored parts of the rim since 2011. The view covers an area about 9 miles wide. It was ta...

Download a PDF of the Spirit and Opportunity Lithograph.

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 infographic highlights NASA’s twin robot geologists, the Mars Exploration Rovers (MER) Spirit and Opportunity.  The rovers landed on the Red Planet in 2004, in search of answers about the hist...