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How a lowdensity cloud of hydrogen in space becomes a star?

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August 01, 2011 4:26PM

Gravity causes the hydrogen molecules to gather together, this causes a strong gravitation pull towards the centre mass, more hydrogen atoms are attracted. Eventually a protostar is formed. As the mass of the protostar increases, the temperature and pressure at the centre increases. When the temperature reaches 10 million degrees Kelvin fusion starts and a star is born.