Ganymede

Ganymede orbits Jupiter is running a satellite orbital period is about seven days. According to the distance of Jupiter from near to far sort Ganymede all satellites of Jupiter, ranked seventh. Ganymede is the largest satellite in the solar system, and its diameter is larger than Mercury, Mercury's mass is about half, which is mainly composed of silicate rocks and ice, body composition, astral obvious stratification, with an iron-rich, liquid core. People speculated that Ganymede 200 km below the surface there is a being sandwiched between two layers of ice between the salt water ocean. Ganymede is the only moon in the solar system known to have magnetic ring satellite, which may be caused by the magnetic ring of iron-rich core of the convective flow generated by the movement. Ganymede has a thin layer of oxygen-containing atmosphere, which contains oxygen atoms, oxygen and ozone, while atomic hydrogen is one of the constituent components of the atmosphere. Ganymede is generally considered by the Galileo first observed in 1610, and later to god in Greek mythology who Gaya Ni pour ink whom named Rhodes