Our Milky Way is a complex and majestic barred spiral galaxy. But 13.7 billion years ago it began, like all galaxies, from the elementary particles formed in the Big Bang. How did our galaxy grow from nothing to the hundreds of billions of stars we see today?
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<a href="http://media.libsyn.com/media/astronomycast/AstroCast-070225.m4a"><strong> Episode 25: The Story of Galaxy Evolution (29.1 MB)</strong></a><br /> <br />
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