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Birth of Stars

By Khan Academy from Khan Academy in ASTRONOMY , PHYSICS

This video belongs to the following courses: Cosmology and Astronomy, Life and Death of Stars

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Stars are formed within extended regions of higher density in the interstellar medium, although the density is still lower than the inside of an earthly vacuum chamber. These regions are called molecular clouds and consist mostly of hydrogen, with about 23–28% helium and a few percent heavier elements.

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Aug. 16, 2012Upload date
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