关于这张图
NASA's Cassini spacecraft captured this view of bands of bright, feathery methane clouds drifting across Saturn's moon Titan on May 7, 2017. The view was obtained during a distant (non-targeted) flyby, during which Cassini passed 303,000 miles (488,000 kilometers) above the moon's surface. Although Cassini will have no further close, targeted flybys of Titan, the spacecraft continues to observe the giant moon and its atmosphere from a distance. The dark regions at top are Titan's hydrocarbon lakes and seas. The image was taken on May 7, 2017, at a distance of 316,000 miles (508,000 kilomete…