The weight of an aircraft is distributed all along the aircraft. The fuselage, along with the passengers and cargo, contribute a significant portion of the weight of an aircraft. The center of gravity of the aircraft is the average location of the weight and it is usually located inside the fuselage.
Saturn's rings were discovered in 1610 by Galileo Galilei, although he did not see enough detail to know what they were. In 2004, the Cassini spacecraft began capturing unprecedented images of Saturn's atmosphere and the complex structure of its rings and moons. It is hypothesized that the rings formed when Saturn swallowed one of its moons.
You all know that Saturn is surrounded by rings ... but did you know that it is not the only one? In fact, ALL the gas giants have rings systems of some sort. The rings around Jupiter were first detected in this image taken by the Voyager 1 spacecraft in 1979. The exposure time was very long -- over 11 minutes! -- in order to search for very faint ring features.