Battered and grooved: Saturn's moon Tethys
CASSINI PHOTO RELEASE
Posted: November 27, 2004
Having now passed closer to Tethys than the Voyager 2 spacecraft, Cassini has returned the best-ever natural color view of this icy Saturnian moon.
This moon is known to have a density very close to that of water, indicating it is likely composed mainly of water ice. Its frozen mysteries await Cassini's planned close flyby in September 2005.
The view shows primarily the trailing hemisphere of Tethys, which is the side opposite the moon's direction of motion in its orbit. The image has been rotated so that north on Tethys is up.
The images comprising this color view were taken with the Cassini spacecraft narrow angle camera on Oct. 28, 2004, at a distance of about 256,000 kilometers (159,000 miles) from Tethys and at a Sun-Tethys-spacecraft, or phase, angle of 50 degrees. The image scale is 1.5 kilometers (0.9 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 Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.
Just in time for the Cassini spacecraft's arrival at Saturn, this new poster celebrates the mission to explore the ringed planet and its moons.
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The 2005 edition of the Universe of the Hubble Space Telescope calendar is available from our U.S. store and will soon be available worldwide. This 12x12-inch calendar features spectacular images from the orbiting observatory.
Taken by Apollo 14 commander Alan Shepard, this panoramic poster shows lunar module pilot Edgar Mitchell as a brilliant Sun glare reflects off the lunar module Antares.
Mars Rover mission patch
A mission patch featuring NASA's Mars Exploration Rover is now available from the Astronomy Now Store.
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The official accident investigation report into the loss of the space shuttle Columbia and its crew of seven. Includes CD-ROM.
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