This image shows Titan, Saturn's largest moon (5,150 kilometers, 3,200 miles across), with a streak-like cloud near its south pole. The cloud may be part of a region of polar clouds seen during Cassini's first flyby of Titan in July 2004, only now covering a larger area.
Titan's atmosphere, like that of Earth, is mostly nitrogen. The pressure at Titan's surface is 50 percent higher than on Earth, despite its lower gravity, meaning that the mass of the atmosphere per unit area is more than ten times that on Earth.
The image was taken in visible light with the narrow angle camera on September 23, 2004, from a distance of 7.1 million kilometers (4.4 million miles) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 84 degrees. The image scale is 42 kilometers (26 miles) per pixel.
The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate, Washington, D.C. The imaging team consists of scientists from the US, England, France, and Germany. The imaging operations center and team lead (Dr. C. Porco) are based at the Space Science Institute in Boulder, Colo.