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    • 6,400 kilometers (4,000 miles)

      • The center of the earth lies 6,400 kilometers (4,000 miles) beneath our feet, but the deepest that it has ever been possible to drill to make direct measurements of temperature (or other physical quantities) is just about 10 kilometers (six miles).
      www.scientificamerican.com › article › why-is-the-earths-core-so
  1. Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 20% of Earth’s radius or 70% of the Moon 's radius.

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  3. Nov 17, 2020 · The center of the Earth is almost as hot as the surface of the Sun, about 9,800 degrees Fahrenheit, with pressure that makes the compressive forces at the ocean floor look like child’s play. But we haven’t been to any of these places inside the Earth.

  4. Oct 6, 1997 · We know that the earth's core depths from 2,886 kilometers to the center at 6,371 kilometers (1,794 to 3,960 miles), is predominantly iron, with some contaminants. How?

  5. Nov 27, 2020 · The center of Earth is almost as hot as the surface of the Sun, about 9,800 degrees Fahrenheit, with pressure that makes the compressive forces at the ocean floor look like child’s play.

  6. Dec 8, 2023 · The inner core is situated at the very center of the Earth, starting at a depth of about 3,500 kilometers. It is primarily composed of solid iron and nickel. Despite the extremely high temperatures at this depth, the inner core remains solid due to the tremendous pressure.

  7. www.nationalgeographic.org › encyclopedia › coreCore

    Jun 11, 2024 · Earth’s core is the very hot, very dense center of our planet. The ball-shaped core lies beneath the cool, brittle crust and the mostly solid mantle . The core is found about 2,900 kilometers (1,802 miles) below Earth’s surface, and has a radius of about 3,485 kilometers (2,165 miles).

  8. Oct 9, 2023 · The center of the Earth is almost 4,000 miles (6,400 kilometers) beneath our feet. To put that into context, the deepest humans have ever drilled is 7.6 miles (12.2 km) down, and it took...

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