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<p>using the <a href="page.php?w=virial_theorem">virial theorem</a>, which states that,  to maintain equilibrium, the gravitational potential energy must equal twice the internal thermal energy. If a cloud is massive enough that the gas pressure is insufficient to support it, the cloud will undergo <a href="page.php?w=gravitational_collapse">gravitational collapse</a>. The mass above which a cloud will undergo such collapse is called the <a href="page.php?w=Jeans_mass">Jeans mass</a>. The Jeans mass depends on the temperature and density of the</p><p>
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