Definition of Sojourner from the Oxford Advanced Learner's Dictionary

 

Sojourner

 
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the small vehicle sent by NASA on the Pathfinder space trip to Mars in 1997. It weighed 25 pounds/11 kilograms, had six wheels and was controlled from earth. It moved on the surface of Mars, taking many photographs and measurements and analysing the rocks, etc. It was named after Sojourner Truth

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