Sojourner Mosaic image of the robotic Sojourner vehicle aboard the Mars Pathfinder on the surface of the red planet Sojourner has an AlphaProton XRay Spectrometer APXS and a highresolution camera to study rocks The rover weighs about kilogrammes is centimetres cm long and cm wide It is powered by a solar panel which will allow for a few hours movement per day An operator on Earth chooses Sojourners next destination but the vehicle itself calculates the best route to take to get there Image taken by the Imager for Mars Pathfinder IMP on the day that it landed Sol on the surface of the red planet on July