CICLOPS: Cassini Imaging Central Laboratory for OPerationS

History on Tethys
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Cassini spies four large impact basins on the southern hemisphere of icy Tethys.

Tethys (1,062 kilometers, 660 miles across), like the other airless worlds of the Solar System, wears the record of countless impacts experienced over the eons.

Lit terrain seen here is on the leading hemisphere of Tethys. North is up and rotated 15 degrees to the left.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on July 21, 2007. The view was obtained at a distance of approximately 452,000 kilometers (281,000 miles) from Tethys and at a Sun-Tethys-spacecraft, or phase, angle of 54 degrees. Image scale is 3 kilometers (2 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.

For more information about the Cassini-Huygens mission, visit and the Cassini imaging team home page,

Credit: NASA/JPL/Space Science Institute
Released: September 7, 2007 (PIA 09723)
Image/Caption Information
  History on Tethys
PIA 09723

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