Episode from the podcastAstronomy Cast

Ep. 255: Observing Hydrogen

Released Monday, 5th March 2012
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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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