What is inside of the planet Saturn?

Saturn is a gaseous planet with a rocky core, a liquid metallic hydrogen layer above the core, and a molecular hydrogen layer above that. The hot, heavy, rocky core has a radius possibly three times the radius of the Earth. Saturn has a strong magnetic field (less than Jupiter's, but still very strong). read more

Lots of hydrogen gas. Saturn has the lowest density of any planet. It has more hydrogen than Uranus or Neptune, but a lower proportion of highly compressed metallic hydrogen than Jupiter, giving a magnetic field strength comparable to Earth's but not Jupiter's which is 10 times stronger. At the center are metals, rocks, and ices. read more