NASA’s Perseverance Mars rover recently took a self-portrait against a sweeping backdrop of ancient Martian terrain at a location the science team calls “Lac de Charmes.” Assembled from 61 individual images, the selfie shows Perseverance training its mast on a rocky outcrop on which it had just made a circular abrasion patch, with the western rim of Jezero Crater stretching into the background. The selfie was captured on March 11, the 1,797th Martian day, or sol, of the mission, during the rover’s deepest push west beyond the crater.   Perseverance is in its fifth science campaign, known as the Northern Rim Campaign, of its mission on the Red Planet. The Lac de Charmes region represents some of the most scientifically compelling terrain the rover has visited.…