English: Voyager 2 image showing the southern hemisphere of Triton. At 2,700 km diameter, Triton is Neptune's largest satellite. This image was made using about a dozen Voyager 2 frames. The large, pinkish colored south polar cap is at the top of the image. North of the cap the surface is generally darker and redder in color. This area exhibits a plethora of unusual morphologic features, including the long lineations at the center of the frame.