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This celestial circle of light is produced by the glow of sunlight scattered through the periphery of Titan's atmosphere. It is the sum of all the sunsets and sunrises taking place on Titan at once.
The intriguing structure of Titan's north polar "hood" can be seen at upper left. A thin, detached, high-altitude global haze layer encircles the moon.
North on Titan (5,150 kilometers, 3,200 miles across) is up and rotated 23 degrees to the left.
The image was taken in visible blue light with the Cassini spacecraft wide-angle camera on June 29, 2007. The view was obtained at a distance of approximately 210,000 kilometers (131,000 miles) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 167 degrees. Image scale is 12 kilometers (8 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.