Titan's Great Lakes

Using its radar system, the Cassini spacecraft has imaged new lakes on Titan.

The large dark patch seen on this image, at high latitudes surrounding Titan's north pole, is most likely a hydrocarbon lake. Several dark channels can be seen; the longest one at the left meanders over almost 100 kilometres, and appears to drain into the lake. Some dark channels are remarkably straight, suggesting possible faulting in the subsurface.