page_title: Sojourner (rover)
hierarchical_section_title: Sojourner (rover)
caption_attribution_description: 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).
context_page_description: Sojourner is a robotic Mars rover that landed on July 4, 1997 in the Ares Vallis region. The rover was the first wheeled vehicle to rove another planet, and was part of the Mars Pathfinder mission. It had front and rear cameras and hardware to conduct several scientific experiments. Designed for a mission lasting 7 sols, with possible extension to 30 sols, it was ultimately active for 83 sols. The rover communicated with Earth through the Pathfinder base station, which had its last communication session with Earth at 3:23 a.m. PDT on September 27, 1997. This marked the end of the Sojourner mission as well.
  Sojourner traveled a distance of just over 100 meters by the time communication was lost. It was instructed to stay stationary until October 5, 1997 and then drive around the lander.
context_section_description: Sojourner is a robotic Mars rover that landed on July 4, 1997 in the Ares Vallis region. The rover was the first wheeled vehicle to rove another planet, and was part of the Mars Pathfinder mission. It had front and rear cameras and hardware to conduct several scientific experiments. Designed for a mission lasting 7 sols, with possible extension to 30 sols, it was ultimately active for 83 sols (85 Earth days). The rover communicated with Earth through the Pathfinder base station, which had its last communication session with Earth at 3:23 a.m. PDT on September 27, 1997. This marked the end of the Sojourner mission as well. 
  Sojourner traveled a distance of just over 100 meters (330 ft) by the time communication was lost. It was instructed to stay stationary until October 5, 1997 (sol 91) and then drive around the lander.
caption: A color image taken by the Sojourner rover of its wheel leaving tracks on Mars
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