The Mars Pathfinder robotic vehicle Sojourner

The Mars Pathfinder robotic vehicle Sojourner

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Credit: NASA/SCIENCE PHOTO LIBRARY

Caption: Sojourner. View of the Mars Pathfinder robotic rover vehicle "Sojourner" during assembly. This rover vehicle landed on Mars on 4 July 1997. It weighs about 9 kilogrammes, is 63 centimetres (cm) long and 48cm wide. It's wheels and suspension are designed for movement over Mars' rocky surface. It is powered by a solar panel (at top) which allows for a few hours of movement per day, and is controlled by an operator on Earth. The Sojourner is equipped with an Alpha Proton X-Ray Spectro- meter (APXS, lower centre). The APXS determines the chemical composition of martian rocks. All elements except hydrogen can be detected in the 10 hours the APXS takes to complete an analysis.

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Keywords: apxs, assembly, mars, mars exploration, mars pathfinder, mars rover, martian, pathfinder, planet, planetary, sojourner

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