* Astronomy

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RE: Janus

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This image of Janus was taken by the Cassini spaceprobe on February 03, 2008, when it was approximately 1,650,703 kilometres away.

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Credit: NASA/JPL/Space Science Institute

The image was taken using the CL1 and CL2 filters.

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This image of Janus was taken by the Cassini spaceprobe on November 26, 2007, when it was approximately 2,197,378 kilometres away.

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Credit: NASA/JPL/Space Science Institute

The image was taken using the CL1 and CL2 filters.

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This image of the irregular moons Prometheus (on the interior of the F ring, right ) and Janus (below centre) was taken in visible light with the Cassini spacecraft narrow-angle camera on June 14, 2007 at a distance of approximately 1.6 million kilometres, from less than a degree above the ringplane.

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Credit: NASA/JPL/Space Science Institute

The image scale is about 10 kilometres per pixel.

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This image of Janus was taken by the Cassini spaceprobe on May 29, 2007, when it was at a distance of approximately 1.5 million kilometres. The view looks toward the rings from about three degrees above the ringplane.

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Credit: NASA/JPL/Space Science Institute

The image was taken in visible light with the Cassini spacecraft narrow-angle camera

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This image of Janus was taken by the Cassini spaceprobe on June 08, 2007, when it was approximately 1,967,856 kilometres away.

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Credit: NASA/JPL/Space Science Institute

The image was taken using the CL1 and CL2 filters.

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This image of Janus was taken by the Cassini spaceprobe on May 16, 2007, when it was approximately 1,995,323 kilometres away.

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Credit: NASA/JPL/Space Science Institute

The image was taken using the CL1 and CL2 filters.

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This image of Janus was taken by the Cassini spaceprobe on April 17, 2007, when it was approximately 2,167,916 kilometres away.

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Credit NASA

The image was taken using the CL1 and CL2 filters.

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This image of Janus was taken by the Cassini spaceprobe on February 24, 2007, when it was approximately 1,631,009 kilometres away.

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Credit NASA

The image was taken using the CL1 and CL2 filters.

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The Cassini spacecraft provides this dramatic portrait of Janus against the cloud-streaked backdrop of Saturn.
Like many small bodies in the solar system, Janus (181 kilometres across) is potato-shaped with many craters, and the moon has a surface that looks as though it has been smoothed by some process. Like Pandora and Telesto, Janus may be covered with a mantle of fine dust-sized, icy material.

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Credit NASA

The image was taken using a spectral filter sensitive to wavelengths of infrared light centred at 930 nanometers. The view was acquired with the Cassini spacecraft narrow-angle camera on Sept. 25, 2006 at a distance of approximately 145,000 kilometres from Janus and at a Sun-Janus-spacecraft, or phase, angle of 62 degrees. North on Saturn is up. Image scale is 871 meters per pixel.