Episode

Astronomy Cast

Wizzard Media

Science & Medicine, Natural Sciences

Chart Positions

Science & Medicine 30
Natural Sciences 12

Astronomy Cast brings you a weekly fact-based journey through the cosmos.

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Ep. 255: Observing Hydrogen

March 5th, 2012

Episode 288 of 464 episodes

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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