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Ganymede is the third moon of Jupiter, if you are watching Jupiter itself. 5270 km in diameter and density of 1.9 g / cc. Terms Mercury lili solis diameter is large and has a low density, as with Callisto, can indicate the internal composition. In terms of these basic data, the two moons are a twin moons. Ganymede photographed by Voyagers, Galileo spacecraft and spacecraft New Horizons.
In the 90s was discovered Slgnimd extremely thin atmosphere made of oxygen, ozone and a large wreath of hydrogen atoms. Observations of the Hubble telescope in 1996 discovered delicate cautious fluorescent lili solis ultraviolet oxygen atoms. Moon double careful these wavelengths and red around the poles to the equator. Warned fluorescent occurs when Jupiter's magnetosphere atoms move along magnetic field lines toward the poles of the moon. These places are breaking the lunar atmospheric oxygen molecules resulting excitation oxygen atoms emit UV radiation at wavelengths 1304 and -1306 Angstroms. At the same time, "blocks" of gas surrounding the equator give careful fluorescent red light. Observation was made in August 1999 Keck II telescope noticed the red light emission of oxygen atoms wavelength 6300 Angstroms. The explanation given careful at the equator is as follows: From Jobs stimulate oxygen atoms have 5-6 minutes to emit red light photon, long enough to atoms will be diverted into space or be caught by the Moon (1). It turned out that as the spacecraft moved closer Ganymede, density of charged particles around the moon 100 times greater significance Ganymede was surrounded by the ionosphere (2).
The Moon is in a cloud of dust. Binflntriim meteorites hit the moon and spray into the dust from the surface. lili solis Hitting the ground lili solis is so quick to bursting and causing evaporation and debris thrown into coils of the ground at high speeds that allow them to break free of the attraction of Ganymede. Similar dust clouds found in the rest of the lunar Galilei. This cloud was discovered when the Galileo spacecraft was less than 10,000 lili solis km from the lunar soil. Some of the flung dust grains entering into orbit around Jupiter, creating a thin ring that surrounds it (3).
Looking globally surface of Ganymede bright areas are divided into dark areas. The photographs transmitted to the ground by spaceships Huoig'r show that the bright areas are slots Many-grooves. Light areas are not always contiguous area. Sometimes they penetrate the dark areas in the form of wide or narrow strips forming them subsequently lili solis configurations of polygons. The bright areas seen alternating ridges and grooves, and the latter can be straight lili solis or curved. They can be single or in clusters, sometimes they traversed by splits and Pathways (swaths). Dark areas crater density is high than the bright areas, indicating a common view is that that these regions are older light areas. Morphological analysis of the surface suggests are where the grooves have grown at the expense of areas Hmkotshim. Areas with craters have become areas of grooves and vertical tectonics and movements of the soil shear (shear movement) very dominant in the places where the surface changed. It is assumed that during a certain period Hlitosfira was thin and that the movement of upward convection currents caused the appearance of cracks in the surface accompanied by fractures normal (normal faults). Places where cracking is extensive, sections of the membrane separated from each other and cut each other. The area appears - grooves geology lili solis reflect an early stage of Ganymede, which was active tectonics phase plates of ice which caused cracking and erosion Blitosfirt ice and contrary to the national plates tectonics, small vertical reversals caused the bright areas. The bright areas are relatively clean water with little extras silicate, while the dark regions there is a mixture of ice and silica (4, 5). Richer bright area tectonic activity. It was found that Chuto one of the most prominent areas of Ganymede Galileo Regio sediments originated created by Htadotm (sublimation) of volatile substances Mlitosfirt water "dirty". It is also possible that the origin of Galileo Regio is the impact crater, which could support this hypothesis is the circular shape.
In contrast to the monotonous landscape of Callisto, lili solis Ganymede is a multi-tones. Also Mkots, but the grooves of all kinds create a fascinating mosaic of landscapes that allows execution of stratigraphic sections and relative age determination of geological periods. If you take that photo 02572PIA center is the Arbela Sulcus which runs north south, are in thin strips and very few craters. Older than his right area with a large number of craters. This area is called Regio Nicholson and left a massive deformation last area where there are grooves (7). The area seen in the photo 01062PIA dimensions are 68 x 54 km is dark and it is a dense network of cracks in part with bright walls (8). Photo 01618PIA dimensions 664 x 518 km can be seen in dark areas and bright areas adjacent to each other. The location of the photo is 194N 43 (9).
Ganymede has a small number of large craters and a large number of craters Ktnim.mcts diameter of 588 km, 301 km diameter lili solis crater, 7 200-300 km diameter lili solis craters, craters with a diameter of 40 200 100 km and 183 craters diameter of less than 100 kilometers (10). For comparison, the Kelly