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"PIA07744: Ringside with Dione" © NASA/JPL/Space Science Institute

„PIA07744: Ringside with Dione“ © NASA/JPL/Space Science Institute

Unter anderem genau wegen solcher Bilder bin ich so begeistert von der Wissenschaft. Das Bild wurde von Cassini gemacht, dem Saturn-Orbiter der 1997 gemeinsam mit dem Titan-Lander Huygens gestartet ist (hier die Missions-Website der NASA).1 Das Bild zeigt den Saturnmond Dione vor Saturn und über den Saturnringen.

Speeding toward pale, icy Dione, Cassini’s view is enriched by the tranquil gold and blue hues of Saturn in the distance. The horizontal stripes near the bottom of the image are Saturn’s rings. The spacecraft was nearly in the plane of the rings when the images were taken, thinning them by perspective and masking their awesome scale. The thin, curving shadows of the C ring and part of the B ring adorn the northern latitudes visible here, a reminder of the rings‘ grandeur.

It is notable that Dione, like most of the other icy Saturnian satellites, looks no different in natural color than in monochrome images.

Images taken on Oct. 11, 2005, with blue, green and infrared (centered at 752 nanometers) spectral filters were used to create this color view, which approximates the scene as it would appear to the human eye. The images were obtained with the Cassini spacecraft wide-angle camera at a distance of approximately 39,000 kilometers (24,200 miles) from Dione and at a Sun-Dione-spacecraft, or phase, angle of 22 degrees. The image scale is about 2 kilometers (1 mile) per pixel.2

Wow! Nur noch mal so zur Erinnerung: Saturn hat eine durchschnittliche Entfernung zur Erde von ca. 1,43 Milliarden Kilometer.3

  1. 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. 
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