Saturn’s rings, Dione and Epimetheus. Cassini Image (April 2, 2016)

Saturn's rings, Dione and Epimetheus. Cassini Image (April 2, 2016)

Usually there are no stars in the images of Saturn, because its main rings, along with its body and moons, are much brighter than most stars. As a result, much shorter exposure times (10 milliseconds, in this case) are required to produce an image. To capture the stars, a longer exposure would be required. Cassini has captured stars on many occasions, especially when a target moon is in eclipse, and thus darker than normal. A beautiful example is the next photo (Number 13) titled “Starry Night​”.

Above the rings, Dione (698 miles, 1123 kilometers across) and Epimetheus (70 miles, 113 kilometers across) can be seen at left and right respectively. The image was taken on April 2, 2016 at a distance of approximately 257,000 miles (413,000 kilometers) from Saturn. Image source: NASA

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