Podcast: Pluto's Planetary Identity Crisis

By Fraser Cain - September 14, 2006 at 9:44 AM UTC | Planetary Science

Pluto. It's a planet, then it's not. This week we review Pluto's history, from discovery to demotion by the International Astronomical Union. Learn the 3 characteristics that make up a planet, and why Pluto now fails to make the grade.

Astronomy Cast is a weekly podcast hosted by Fraser Cain from Universe Today, and Dr. Pamela Gay (of Slacker Astronomy fame). Each week we take a fact-based journey through the cosmos to explain the discoveries in astronomy, and understand how we know what we know.

Episode 1 - Pluto's Planetary Identity Crisis

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Pluto's Planetary Identity Crisis

  • Show notes and transcript

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Fraser Cain

Fraser Cain

Fraser Cain is the publisher of Universe Today, founding the website in March 1999. He's also the co-host of Astronomy Cast.