Jezero陨石坑，“火星2020”的着陆点

美国宇航局的“火星2020”将在Jezero陨石坑着陆，如图所示。这张照片是由美国宇航局火星勘测轨道飞行器上的仪器拍摄的，这些仪器定期拍摄未来任务的潜在着陆点图像。

在古代的火星上，水在湖盆内刻划出沟壑，将沉积物搬运到湖盆内形成扇形和三角洲。对从轨道获得的光谱数据的检查表明，这些沉积物中的一些具有指示水化学变化的矿物质。在Jezero火山口三角洲，沉积物中含有粘土和碳酸盐。

NASA’s Mars 2020 will land in Jezero Crater, pictured here. The image was taken by instruments on NASA’s Mars Reconnaissance Orbiter, which regularly takes images of potential landing sites for future missions.

On ancient Mars, water carved channels and transported sediments to form fans and deltas within lake basins. Examination of spectral data acquired from orbit show that some of these sediments have minerals that indicate chemical alteration by water. Here in Jezero Crater delta, sediments contain clays and carbonates.

Image Credit: NASA/JPL-Caltech/ASU