The image on Mars was taken by a camera aboard NASA's Sojourner rover on July 8, 1997. A rover wheel is at center, and tracks are visible in the soil at top where the cleated wheel passed over the surface.

The image was taken by a camera aboard the Sojourner rover on Sol 4. A rover wheel is at center, and tracks are visible in the soil at top where the cleated wheel passed over the surface.

Mars Pathfinder is the second in NASA's Discovery program of low-cost spacecraft with highly focused science goals. The Jet Propulsion Laboratory, Pasadena, CA, developed and manages the Mars Pathfinder mission for NASA's Office of Space Science, Washington, D.C. JPL is an operating division of the California Institute of Technology (Caltech).

Photojournal note: Sojourner spent 83 days of a planned seven-day mission exploring the Martian terrain, acquiring images, and taking chemical, atmospheric and other measurements. The final data transmission received from Pathfinder was at 10:23 UTC on September 27, 1997. Although mission managers tried to restore full communications during the following five months, the successful mission was terminated on March 10, 1998.

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