The core of the earth is also called the barysphere. It is the central part of the Earth, consisting of a solid inner core and a liquid outer core. The inner core is believed to be composed mainly of iron and nickel, while the outer core is also composed of iron, nickel, and other elements. The barysphere is an important part of the Earth's structure, as it is responsible for generating the Earth's magnetic field, which is important for life on Earth.