Humphrey on the Inside

Spirit examined spectacular layered rocks exposed at "Home Plate."

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 360-degree view from a site dubbed "Engineering Flats" shows the rover's shadow.

The "Columbia Hills" flank Spirit's path in this view.

A forward-looking view of a portion of the "Columbia Hills" captured by Spirit shows the expansive hills ahead. It features "Husband Hill" to the left, "West Spur" in the center, and a talus (rock...

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...

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 shows stone stripes on the side of a volcanic cone on Mauna Kea, Hawaii. The stripes are made of small rock fragments and they are aligned downhill as freeze-thaw cycles have lifted them...

As NASA's Mars Exploration Rover Opportunity neared the ninth anniversary of its landing on Mars, the rover was working in the 'Matijevic Hill' area seen in this stereo view from Opportunity's pano...

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 full-circle panorama shows the terrain around the NASA Mars Exploration Rover Opportunity during the 3,071st Martian day, or sol, of the rover's work on Mars (Sept. 13, 2012).

This self-portrait from Opportunity shows dust accumulation on the rover's solar panels as the mission approached its fifth Martian winter.

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.

What looks like the rover "neck and head" is called the Pancam Mast Assembly.

This false-color view was taken by the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity on the 3,230th Martian day, or sol, of the rover's mission (Feb. 23, 2013). The rock ta...

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...

The enhanced-color image taken by the microscopic imager on the Mars Exploration Rover Spirit shows the rock dubbed "Mazatzal" after a portion of its surface was brushed clean by the rover's rock a...

In late November 2005 while descending "Husband Hill," Spirit took the most detailed panorama so far of the "Inner Basin," one of the rover's target destination.

This bird's-eye view combines a self-portrait of the spacecraft deck and a panoramic mosaic of the Martian surface as viewed by the Spirit rover.

Rover 2 equipment deck, with solar arrays partially deployed, in JPL's Spacecraft Assembly Facility's cleanroom.

View the many unique areas that the Mars Exploration Rover Opportunity traveled during its 11 year historic journey. (Audio: music only)

This false-color image taken by the panoramic camera onboard the Mars Exploration Rover Opportunity highlights the spherules that speckle the rock dubbed Stone Mountain

NASA's Curiosity finds crystals, Opportunity celebrates her 5,000th day on Mars and the MarCO smallsats get solar arrays.

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...

The second Mars Exploration Rover, Opportunity, was the first NASA mission lifted on what is referred to as a Delta II "heavy" rocket.