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Ep. 255: Observing Hydrogen

5 Mar 2012, 00:00 UTC
Ep. 255: Observing Hydrogen
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Hydrogen is the most common element in the Universe, formed at the beginning of everything in the Big Bang. It's the raw material of stars, gathering together through mutual gravity into vast nebulae. Astronomers can learn so much looking for hydrogen in the Universe. Here's why, and how they do it.

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