Solar eclipses seen by long-dead Cassini spacecraft shed new light on Saturn's rings 

 Data from the long-deceased Cassini spacecraft offers astronomers an unconventional way to measure the optical depth of Saturn's rings.  

https://cdn.mos.cms.futurecdn.net/nfnwkMpeCeWvysjXL84HiG.jpg

https://www.space.com/saturn-rings-transparency-cassini-eclipse-data