Darkness falls on the night side of massive Saturn and its tiny moon Tethys. Tethys is literally quite tiny as it is just 1,062 kilometers across and in this picture, is just barely seen (thanks to being brightened by NASA in post production) in the lower left quadrant.

The Cassini spacecraft took this picture with its wide-angle camera, utilizing a special filter allows near-infrared light wavelengths. It was taken when Cassini was about 2.4 million kilometers from Saturn.