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Dione and Rhea: full sequence of their "dance"
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Caption NASA originale:"Rhea (1.528 Km across) is larger than Dione (1.118 Km), but also is farther away as seen here, which explains why the two moons appear to be roughly the same angular size.
The view shows principally the anti-Saturn side of Dione, and the Saturn-facing side of far-off Rhea.
The images in this mosaic were taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 20, 2005, at a distance of approximately 1,5 MKM (approx. 900.000 miles) from Dione and about 2,3 MKM (approx. 1,4 MMs) from Rhea.
The image scale is approximately 9 Km per pixel on Dione and 14 Km per pixel on Rhea".
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