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The study of the composition or dynamics of the gaseous layers around planets, often applied to questions on Earth's atmosphere but can be applicable to all planets & moons in the solar system.

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speed of gas molecules when they escape to space

Escape velocity on the surface of earth is 11.2 km/s which is 11200 m/s. RMS velocity is given by Vrms = √(3RT/M) where M = molecular mass of oxygen = 32 g/mol = 0.032 kg/mol (converting to …
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