South Polar Basin on Titan

An enigmatic large basin appears in the south polar region of Saturn's moon Titan at the center of this Titan Radar Mapper image from NASA's Cassini spacecraft acquired on June 22, 2009. Centered near 76.5 degrees south latitude, 213 degrees west longitude, the image covers an area of 190 by 140 kilometers (118 to 87 miles). The basin itself is 100 kilometers wide (62 miles). The radar