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The moon Daphnis is shown making waves in Saturn's rings in this view from the Cassini spacecraft on Jan. 16, 2017. This is the closest view of the small moon obtained to date. Daphnis (5 miles or 8 kilometers across) orbits within the 42-kilometer (26-mile) wide Keeler Gap. Cassini's viewing angle causes the gap to appear narrower than it actually is, due to foreshortening. The little moon's gravity raises waves in the edges of the gap in both horizontal and vertical directions. Daphnis appears to have a narrow ridge around its equator and a fairly smooth mantle of material on its surface - likely an accumulation of fine particles from the rings. Fine details in the rings are also on display in this image. In particular, a grainy texture is seen in several wide lanes which hints at structures where particles are clumping together. In comparison to the otherwise sharp edges of the Keeler Gap, the wave peak in the gap edge at left has a softened appearance. This is possibly due to the m...