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What is the force that keeps a main sequence star from collapsing on itself?
Q1: Concerning our solar nebula theory, the presence
Q12: Why couldn't you stand on the Sun's
Q29: Emission nebulae occur only near stars that
Q32: Describe what the internal structure of the
Q49: To deduce the interior conditions of the
Q81: Hot Jupiters are thought to have moved
Q98: An object in the sky brightens suddenly,
Q100: Neutral hydrogen is most obvious in the
Q107: Protostars can be observed in:<br>A)the Crab Nebula.<br>B)the
Q112: Rotation of the protostar helps generate the