Inner Core

The inner core of the Earth, its innermost part as detected by seismological studies, is a primarily solid ball about 1,220 km (760 mi) in radius, or about 70% that of the Moon. It is believed to consist of an iron–nickel alloy, and may have a temperature similar to the Sun's surface, approximately 5700 K (5430 °C).

Read more about Inner Core:  Discovery, Composition, Temperature and Pressure, Dynamics, History

Famous quotes containing the word core:

    For books are more than books, they are the life
    The very heart and core of ages past,
    The reason why men lived and worked and died,
    The essence and quintessence of their lives.
    Amy Lowell (1874–1925)