On Mars.. In the photo, left to right, bright (white) carbon dioxide frost at the edge of the northern polar region, a 700m cliff, and the cloud of debris at the base of the cliff. Image from the High Resolution Imaging Science Experiment on NASA’s Mars Reconnaissance Orbiter. More on the avalanche[s] here. Image Credit: NASA/JPL-Caltech/University of Arizona. Btw, there’s another stunning image below the fold.
Most of the stunning astronomical photos are of elsewhere.. this one is of here. The view from Mars.