These three Cassini images show a propeller-shaped structure created by an unseen moon in Saturn’s A ring. (Image credit: NASA/JPL-Caltech/SSI/Cornell.)
Home These three Cassini images show a propeller-shaped structure created by an unseen moon in Saturn’s A ring. (Image credit: NASA/JPL-Caltech/SSI/Cornell.) These three Cassini images show a propeller-shaped structure created by an unseen moon in Saturn's A ring. (Image credit: NASA/JPL-Caltech/SSI/Cornell.)