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This animation shows a mosaic of imagery from Cassini's radar instrument obtained during three flybys of Titan's north pole: T16 (July 22, 2006), T18 (Sept. 23, 2006) and T19 (Oct. 9, 2006). The most striking discovery from these flybys was the near-polar hydrocarbon lakes, which are far darker than the surrounding terrain. Ranging in size from a few kilometers up to about 100 kilometers (62 miles) in diameter, they are most likely the result of increased rainfall and decreased evaporation at the cold higher latitudes. Scientists will be looking for signs of change in lake shape in future flybys covering the same area, which may indicate changes in lake level.
... This movie blends a near natural-color view and an infrared glimpse of Titan's surface obtained by the visual cameras, followed by a transition to imagery collected by the radar instrument aboard Cassini, for a dramatic reveal of the north pole of Saturn's largest moon.
As the movie zooms in on the north pole, the most readily visible bodies are outlined in blue. The largest of these, on the left, is as big as the Caspian Sea on Earth; the next largest, on the right, is about the size of Lake Superior. When compared to the surface area of Titan however (which is six times smaller than Earth's), these bodies are equivalent in size to the Bay of Bengal and Timor Sea, respectively. Geographically speaking, they are more like seas.