This image taken by the Mars Reconnaissance Orbiter spacecraft’s HIRISE instrument on Oct. 23, 2022, of the northern plains of Arabia Terra shows craters that contain curious deposits with mysterious shapes and distribution. For instance, the deposits are located on the south sides of the craters, but not usually in the north, and are found only in craters larger than 600 meters in diameter. Scientists suspect that these features formed by sublimation of ice-rich material.
Learn more about these crater deposits.
Image Credit: NASA/JPL-Caltech/University of Arizona
图片来源：NASA/JPL-Caltech/University of Arizona