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.
Saturn's rings. The rings of Saturn have puzzled astronomers ever since they were first seen by Galileo in 1610, during the first telescopic observations of this planet. Although he saw the rings first, Galileo did not know what they were. They appeared to him as 'ears' or lobes either side of the planet. It was Christaan Huygens who first proposed that Saturn was surrounded by a solid ring in 1655.