Astronomy Cast

Wizzard Media

Science & Medicine, Natural Sciences

Chart Positions

Natural Sciences 9
Science & Medicine 21

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


Ep. 177: Mysteries of the Milky Way, Part 2

February 15th, 2010

Episode 209 of 460 episodes

We survived our first group of mysteries, so now we move onto our second set of stuff of amazing Milky Way mysteries. How many spiral arms does our galaxy have, and why does everything keep dying every 60 million years or so?

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