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.
This article is part of the NASA Knows! (Grades K-4) series. Saturn is a funny-looking planet. True, it's not the only planet with rings. Jupiter, Uranus and Neptune have rings, too. But Saturn's rings are the biggest and brightest. An astronomer named Galileo was the first person to see Saturn's rings. He spotted them while looking into space through a telescope in 1610. That's almost 400 years ago! Scientists have been trying to learn more about Saturn's rings ever since. One thing we know for sure. Saturn's rings are made of ice and rock. These pieces vary in size.