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Wednesday, April 3, 2013

Secrets of icy Dione


Scientists find out some of the secrets of the fourth moon of Saturn. Dione is the fourth largest natural satellite of Saturn. Dione was release the famous Italian astronomer Giovanni Cassini in 1684. However, officially its current name the given satellite of has received only in 1847. Its diameter is 1 123.4 kilometers. This Saturnine satellite of consists predominantly of water ice with considerable admixture of stone breeds of in internal layers of. Scientists have made a similar postulation proceeding from the density of Dione.


By size of Dion is the 15 th largest satellite of our the Solar of the System.

Every 2.7 of earthly of the day of Dion is drawn on an orbit round of Saturn on the distance of 377 400 of kilometers from of its surface. Dione I vary sharply leading and trailing hemisphere. It is caused by, that satellites they are always oriented to Saturn by one party and one of the hemispheres "looks" to the side satellite motion in the orbit. A leading hemisphere of Dyons strongly cratered and homogeneously by brightness. Rear hemisphere contains the dark areas of, as well as cobwebs of thin light stripes that are the icy ridges and precipices. According to data supplied by satellites "Cassini", some of them have the height of in some hundred meters.

During the time of research of system of satellites of Saturn and of rapprochement with the Dione, a cosmic apparatus "Cassini" discovered around of this satellite a thin-aspirated layer, consisting counting from the small amount of oxygen (1 oxygen ion is by 11 cm3).

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