Ep. 25: The Story of Galaxy Evolution

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?


  • Episode 25: The Story of Galaxy Evolution (13.8 MB)
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    Astronomy Cast Episodes
    Our archive is full of background information. Don’t forget to check out these shows from the past!

    • Episode 5: The Big Bang and the Cosmic Microwave Background
    • Episode 6: More Evidence for the Big Bang
    • Episode 4: The Search for Dark Matter
    • Episode 20: What We Learned from the American Astronomical Society (see interview segment with Dr. Richard Massey)
    • Episode 18: Black Holes Big and Small
    • Episode 21: Black Hole Questions Answered

    Hercules Cluster

    Edwin Hubble

    Hubble Classification

    Density Waves

    Supermassive Black Holes

    Quasars and Active Galactic Nuclei

    Peculiar Galaxies

    Interactive applets, sky guides and more:

    One Response to Ep. 25: The Story of Galaxy Evolution

    1. Gammidgy September 8, 2009 at 2:42 pm #

      I thought you might want to know that Arp’s Catalog of Peculiar Galaxies, mentioned in your brilliant Episode 25, has now moved to http://arpgalaxy.com/

      Please keep up the great work.

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