Episode

Astronomy Cast

Wizzard Media

Science & Medicine, Natural Sciences

Chart Positions

Natural Sciences 11
Science & Medicine 31

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

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Episode 1: Pluto's Planetary Identity Crisis

September 11th, 2006

Episode 1 of 464 episodes

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.

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