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. Tombaugh worked at the Lowell Observatory and found Pluto within 6 degrees of Lowell's prediction by looking at photographic plates . His story . They have announced that they have no intention of changing Pluto's status as a planet.