As Cassini spacecraft images often show, the Sun is not the only source of
illumination in the Saturn System. The huge, reflective planet also shines
upon its moons.
This image was acquired by Cassini two minutes after PIA09886 and looks
almost directly at down onto the north pole of Dione (1,126 kilometers, or
700 miles across). The left side of this image is illuminated by the Sun,
and most of the right side is lit by reflected light from Saturn. Several
background stars made faint trails across the sky during this long
exposure.
The image was taken in visible light with the Cassini spacecraft
narrow-angle camera on March 22, 2008. The view was acquired at a distance
of approximately 649,000 kilometers (403,000 miles) from Dione and at a
Sun-Dione-spacecraft, or phase, angle of 99 degrees. Image scale is 4
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 mission for NASA's Science Mission Directorate, Washington, D.C. The
Cassini orbiter and its two onboard cameras were designed, developed and
assembled at JPL. The imaging operations center is based at the Space
Science Institute in Boulder, Colo.
For more information about the Cassini-Huygens mission visit
http://saturn.jpl.nasa.gov/. The Cassini imaging team
homepage is at http://ciclops.org.