How Do We Know What's in the Earth's Core?

thespacethought🪐 on Instagram: "Deep beneath our feet lies Earth’s beating heart — the core. Starting about 2,900 kilometers below the surface and stretching to the planet’s center, roughly 6,371 kilometers deep, this mysterious region holds the key to Earth’s power and protection. The outer core, a swirling ocean of molten iron and nickel, moves under extreme heat and pressure. This restless motion generates Earth’s magnetic field — our invisible shield against deadly solar radiation, the very

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