Earth's magnetosphere is a region of space surrounding our planet where the behavior of charged particles is largely influenced by Earth's magnetic field. It extends far beyond the ionosphere, which is a region of the Earth's atmosphere located from about 48 kilometers (30 miles) to 965 kilometers (600 miles) above the Earth's surface. The magnetosphere extends into space and interacts with the solar wind, a stream of charged particles emitted by the Sun, well beyond the boundaries of the ionosphere. The boundary of the magnetosphere, known as the magnetopause, can vary in distance from Earth depending on the strength and direction of the solar wind, but it typically extends tens of thousands of kilometers into space.
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