Ring Crossing: In this still from the short film Cassini's Grand Finale (https://saturn.jpl.nasa.gov/resources/7628/), the spacecraft is shown diving between Saturn and the planet's innermost ring. Credit: NASA/JPL-Caltech

Ring Crossing: In this still from the short film Cassini’s Grand Finale (https://saturn.jpl.nasa.gov/resources/7628/), the spacecraft is shown diving between Saturn and the planet’s innermost ring. Credit: NASA/JPL-Caltech