Take the impact crater we have here, a relatively young one if we are to judge by the darker color it has, a telltale sign it’s been born not that long ago, talking on a cosmic scale, of course. The place has been photographed several times, according to scientists from the University of Arizona, who run the HiRISE orbital camera, by this new piece of equipment, with the most recent pic, the one we have here, snapped back in January 2022.
But the crater has been the focus of previous missions as well, with NASA’s Mariner 9 being the first to capture it on film. The Mariner 9 flew around Mars in 1971 as the first human-made spacecraft to orbit another planet and snapped over 7,000 images of the rock.
Some of them showed this crater, which since the 1970s has faded a bit in color (although not that much since the first HiRISE photo taken back in 2007), and will probably do so some more in the years ahead, as it will get buried in the Martian dust.
Scientists say they are looking at these changes and how fast they occur to better “understand changes on the Martian surface today.”