Dione and Tethys. Cassini image of two of Saturn's moons Dione (upper) and Tethys (lower). The planet's rings are seen across the lower frame. Dione h

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Dione and Tethys. Cassini image of two of Saturn's moons Dione (upper) and Tethys (lower). The planet's rings are seen across the lower frame. Dione has a diameter of 1130 kilometres and is the densest of Saturn's moons. Tethys has a diameter of 1060 kilometres and is composed almost entirely of pure water ice. The Cassini-Huygens spacecraft was launched in 1997 to investigate Saturn, its rings and its moons. This image was taken by Cassini's narrow-angle camera on the 22nd September 2005 at a distance of 860,000 kilometres from Dione and million kilometres from Tehtys.

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Size: 2507px × 2507px
Photo credit: © NASA/JPL/SPACE SCIENCE INSTITUTE/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 22, 2005, 21st, astronomical, astronomy, black--white, camera, cassini, cassini-huygens, century, dione, exploration, iv, monochrome, moon, moons, narrow-angle, planetary, ring, rings, saturn, saturnian, science, september, solar, space, spacecraft, system, tethys