The liquid core makes up 80 percent of the mass of the planet, mostly comprised of water, methane, and ammonia ice, though it only extends to about 20 percent of the radius. The internal heat of Uranus is lower than astronomers would expect. The planet's core heats up to 9,000 degrees Fahrenheit (4,982 degrees Celsius). read more
The ice giant Uranus is certainly different from other gas giants such as Jupiter and Saturn, which are both mostly composed of helium and hydrogen. Uranus is composed, mostly of various ices such as methane and ammonia. Its mass has been approximated at 14.5 times that of Earth. read more