Lakes With Ice – on Titan!?!

The intrepid Cassini robot explorer is still zipping around the Saturnian system, returning reams and reams of great science data.  One product of recent close passes to Saturn's moon Titan is high-resolution radar images of the Titanian surface (one of these is at right).

The bright areas on this image are from ground areas covered with frozen methane “ice”; these areas reflect radar well.  The dark areas are suspected of being liquid methane “lakes”.  Some of these are quite large, about like the U.S. Great Lakes.  But look closely, and you'll see some lake-shaped areas that are of intermediate brightness.  Scientists think these are lakes of liquid methane that are partially covered with frozen methane ice.

Titan is one of the most fascinating objects in our solar system.  The surface gravity is just 0.14g, or about 1/7th of Earth's.  The atmospheric pressure is about 50% higher than Earth's, but it's very cold (just above -300°F) and it has no oxygen.  Even so, biologists think that its at least possible that there might be life on Titan.  I would love to see a Curiosity-style rover exploring Titan...