A PHOTO: Staggering Structure Author AlexPublished on September 7, 2017 This view from NASA's Cassini spacecraft shows a wave structure in Saturn's rings known as the Janus 2:1 spiral density wave. via NASA http://ift.tt/2gKui8n Share this:MastodonEmailLike this:Like Loading... Related posts: A PHOTO: Ring Details on Display A PHOTO: Illustration of Cassini Spacecraft Diving Through Plume of ‘Ocean World’ Enceladus A PHOTO: Illustration of Cassini Spacecraft’s Grand Finale Dive A PHOTO: Jupiterrise