关于这张图
Images here show the sunlit side of Saturn's rings. A strip along the bottom of each image has been filtered so that the textures are more visible. The filter consists of averaging and then subtracting out the major brightness variations across the scene. The images illustrate how textures in Saturn's rings differ, even in close proximity. Cassini had previously discovered that straw-like clumpy textures are visible in the troughs of the strongest density waves, such as the Janus 6:5 wave in the outer A ring (at top of Figure 1A). Images from Cassini's Ring Grazing Orbits show that similar clu…
