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DEUTSCH: Janus am 20.05.2005 (Orbit 8). Die Bildauflösung beträgt 2 km/pxl.|
ENGLISH: This close-up look at Janus (181 kilometers, 113 miles across) reveals spots on the moon’s surface which may be dark material exposed by impacts. If the dark markings within bright terrain are indeed impact features, then Janus’ surface represents a contrast with that of Phoebe, where impacts have uncovered bright material beneath a darker overlying layer.
Janus is supposed by scientists to be a porous body, composed mostly of water ice.
The image was taken in visible light with the narrow angle camera on May 20, 2005 from a distance of approximately 357,000 kilometers (222,000 miles) from Janus and at a Sun-Janus-spacecraft, or phase, angle of 6 degrees. Resolution in the original image was 2 kilometers (1 mile) per pixel. The view was magnified by a factor of two and contrast-enhanced to aid visibility of the moon’s surface.
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