An ice moon may be volcanoes Facts
NASA space unit investigated icy moon of Saturn Dione for geological activity. Data were obtained that the bark of the satellite has a similarity of cracks, which may indicate the presence of active volcanoes on it. It is reported that the faults found are very similar to the "tiger stripes" of another moon of Saturn, Entseladusa who once splashed huge amounts of water into space.
Activity on Dione is supported by several obvious facts. Earlier in the magnetic field of Saturn was discovered by a stream of charged particles, most likely got there by Dione. In addition, around the moon formed a thin layer of oxygen-containing atmosphere. But most of all for the benefit of the activity on the moon's surface itself says, though obvious signs of the eruption has not been discovered.
Large areas are covered with special Dione incomplete craters kriovulkany very similar to that found on Enceladus and Neptune's satellite Triton. These volcanoes spew methane or ammonia, which form deposits and fill craters. Another explanation for the occupancy of craters, scientists have found in the outer space debris that could fall on the surface of Dione.
Fig. Diameter of Dione is 1.122 km. Surface of the satellite is covered with ice, the core is made of rock.
The satellite also has craters, formed by the collision of space debris with a loose surface. This could mean that the temperature of the ice in the deeper layers is much warmer than expected. Heat source on Dione is not found. According to scientists, active geological processes on the moon, this may not be so obvious as to Enceladus, so it is difficult to fix. However, taking into account the fact that on Enceladus, and now there are geysers that are fed by underground ocean on Dione could previously be similar processes and these powerful eruption. Especially when you consider the fact that the orbit of the satellites revolve, oval, which is why they are constantly exposed to a magnetic field of Saturn, which provokes the release of heat from the depths of satellites, and hence the volcanic activity.