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Portable Network Graphic  |  1996-04-23  |  5.8 KB  |  242x277  |  8-bit (43 colors)
   ocr: CORE THE CORE IS the central part ofan object. The core ofa a celestial object is often differentin Structure and composition from the parts that surround the core. The core ofthe Earthis about 1,200 km (750: 1 miles) in diameter andis composed of solidiron and nickel.