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<p>can be thought of like planetary winds where solar radiation heats up the upper atmosphere a lot, eventually leading to lighter atoms escaping and creating a flow that helps drag the heavier ones along. </p>

<p><big> Description </big></p>
<p>Particles in the atmosphere need to achieve sufficiently high velocity (higher than the <a href="page.php?w=escape_velocity">escape velocity</a>) to escape from the planetary gravity field. There are different ways to achieve this velocity. Those processes in which the high velocity is related to the temperature</p><p>
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