HIRISE发现火星陨石坑沉积物
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
2022年10月23日，这张由火星勘测轨道飞行器HIRISE仪器拍摄的阿拉伯半岛北部平原的照片显示，陨石坑中含有神秘形状和分布的奇怪沉积物。例如，这些沉积物通常位于陨石坑的南侧，而不在北侧，而且只在直径超过600米的陨石坑中发现。科学家怀疑这些特征是由富含冰的物质升华形成。
图片来源：NASA/JPL-Caltech/University of Arizona