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The exosphere is the outermost layer of Earth's atmosphere, extending from about 600 kilometers (370 miles) above the surface to around 10,000 kilometers (6,200 miles). It primarily serves as the transition zone between the Earth's atmosphere and outer space, where atmospheric particles are extremely sparse. In this layer, gases like hydrogen and helium are present in very low densities, and it plays a crucial role in satellite orbits and the transmission of solar radiation. The exosphere is also where satellites operate, making it vital for telecommunications and global positioning systems.
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