Lasted for about 1 hour before pressures crushed it. Properties much like liquid metal, including high electrical conductivity. Called Galilean Moons after Galileo. Aurora visible . The appearance of the rings changes seasonally - brightest in Saturn's summer and winter due to planet axis tilt.
Hydrocarbons contain the building blocks for life.
Thick cloud cover prevented pictures of the surface. Instead, named after the Greek god of the Heavens. Blue color comes from presence of methane and absence of ammonia. Methane absorbs red light, leaving blues, yellows and greens. Magnetic Field 50 times stronger than Earth's field tilted by 59 o from its rotation axis does not pass through center of planet Neptune Discovered in 1846 by German Johann Galle by looking at deviations of Uranus' orbit from Kepler's Laws.