关于这张图
The lower portion of a Martian dust devil was captured by one of the Navcams on NASA's Perseverance rover on Aug. 30, 2023, the 899th Martian day, or sol, of the mission. The video, which has been enhanced in order to show maximal detail, was sped up 20 times and composed of 21 frames taken four seconds apart. Using data from the imagery, mission scientists determined that the dust devil was about 2.5 miles (4 kilometers) away, at a location nicknamed "Thorofare Ridge," and moving east to west at a clip of about 12 mph (19 kph). They calculated its width to be about 200 feet (60 meters). Whil…
