NASA and JPL released this image of a 400 kilometer long river system on Titan. The image was taken on 26 September 2012 by the Cassini spacecraft (in orbit around Saturn) during its 87th flyby of Titan.
The image is oriented with North to the right. The river system flows into the Ligeia Mare, one of three oceans in the northern hemisphere of Titan.
The river is black in appearance, which denotes a smooth surface. Therefore, scientists think that the river is filled with liquid Methane and Ethane along its entire distance.