Home › Links › APOD: 2015 April 5 – Saturn, Tethys, Rings, and Shadows APOD: 2015 April 5 – Saturn, Tethys, Rings, and Shadows April 5, 2015 • Updated Mar 28, 2019 • Links • 1 min read APOD: 2015 April 5 – Saturn, Tethys, Rings, and Shadows.