One of the last images of the Saturn moon Dione from the Cassini spacecraft shows nice detail on the moon surface. Scientists say that the subtle variations in brightness hint at differences in composition, as well as the size and shape of grains in Dione’s surface material, or regolith.
The view was obtained at a distance of approximately 224,000 miles (360,000 kilometers) from Dione which isn’t too much different than our Earth-moon distance. Image scale is 1.4 mile (2.2 kilometers) per pixel
The Cassini spacecraft entered the Saturn atmosphere right on schedule on 15 September 2017.
Image: NASA/JPL-Caltech/Space Science Institute