Stronger reveal that there is an ocean under test Ganymede, largest moon in the solar system

This is what revealed new information from the Hubble telescope, which has been studying the motion of auroral lights in this satellite of Jupiter.
The presence of water under the ice mass Ganymede makes a particularly interesting celestial object as it is an indication that could harbor life.
"The ocean can not be older than the 330km depth, deeper than would be inconsistent with the information (we have)"Explained Joachim Saur Leader of research at the University of Cologne in Germany.
"Information is consistent with an ocean of 100Km thick with a salt content of about 5 grams per liter of water. But it may as well be an ocean of only 10km, but with 10 times more salt. "
Magnetic Field
The Galileo mission for NASA suggested in the early 2000s that the satellite had a hidden Sea.
The Hubble data seem to confirm this suspicion.
With a diameter of about 5.300Km, Ganymede is the largest moon in the Solar System.
On average delay seven days to orbit around Jupiter.
Ganymede is also the only moon-of which it has knowledge-which has a magnetosphere: a region where magnetic field deflects most of the solar wind thus forming a protective shield against high energy charged particles from the sun.

SOURCE: Bbc.co.uk