Spirit is healthy and spent the last week studying light and dark soil in and around the rover’s tracks between “Home Plate” and “Mitcheltree Ridge.” Spirit collected additional soil data, including ...

image: An orbital view of Victoria Crater on Mars, showing the path of the Opportunity rover along the north rim. Mars rover scientists have launched a new long-term study on the Martian atmosphere ...

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This image shows the Mars Exploration Rover Spirit probing its first target rock, Adirondack. At the time this picture was snapped, the rover had begun analyzing the rock with the alpha particle X-ray ...

Endeavour shuttle commander Mark Kelly, left, and Nobel laureate Sam Ting (principal investigator for the Alpha Magnetic Spectrometer) look over the instrument as it sits in a work stand at NASA's ...