Earth's inner core is the innermost layer of the planet, located at the center beneath the outer core. It is composed primarily of iron and nickel, along with some lighter elements. The inner core is solid due to the immense pressure at this depth, which exceeds temperatures of approximately 5,000 to 7,000 degrees Celsius (9,000 to 12,600 degrees Fahrenheit).
New to topics? Read the docs here!