Rovers begin new observations on changing Martian atmosphere

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 with the Alpha Particle X-ray Spectrometer, an instrument that was originally developed at the University of Chicago. This orbital view was acquired by the High-Resolution Imaging Science Experiment camera on the Mars Reconnaissance Orbiter. Image courtesy of NASA/JPL-Caltech/UofA/USGS