Cassini's 'Inside-Out' Rings

This image from NASA's Cassini spacecraft offers a unique perspective on Saturn's ring system. Cassini captured images from within the gap between the planet and its rings, looking outward as the spacecraft made one of its final dives through the gap as part of the mission's Grand Finale. Using its wide-angle camera, Cassini took the 21 images in the sequence over a span of about four minutes during its dive through the gap on Aug. 20, 2017. The images have an original size of 512 x 512 pixels; the smaller image size allowed for more images to be taken over the short span of time. The entirety of the main rings can be seen here, but due to the low viewing angle, the rings appear extremely foreshortened. The perspective shifts from the sunlit side of the rings to the unlit side, where sunlight filters through. On the sunlit side, the grayish C ring looks larger in the foreground because it is closer; beyond it is the bright B ring and slightly less-bright A ring, with the Cassini Division between them. The F ring is also fairly easy to make out. A movie is available at https://photojournal.jpl.nasa.gov/catalog/PIA21886