Pluto: The Demoted Dwarf Planet

This 2021 episode covers smallpox, a viral disease that has existed for millennia. But it’s now one of only two diseases that’s been eradicated through human activity, and a global plan was enacted to do it. See omnystudio.com/listener for privacy information. 

Holly talks about the lack information about Pinel’s family, and how much she’d like to see Oscar Wilde use social media. Tracy discusses the way the Cooley episode narrowed down the scope of her originally planned topic.See omnystudio.com/listener for privacy information. 

Pluto is tiny, icy, and used to be the ninth planet in the solar system. Used to be. So why isn’t Pluto a planet anymore? Join Molly and co-host Momo as they learn Pluto’s history, talk to planetary scientist Kelsi Singer about NASA’s New Horizons mission, and even hear from the ...  Show more

An international committee of astronomers agreed Pluto wasn't really a planet in 2006. They reclassified it as a 'dwarf planet' instead. The decision was made after Mike Brown of the California Institute of Technology identified a larger body, Eris, in the Kuiper Belt. He has bee ...  Show more

Although the International Astronomical Union demoted Pluto from a planet to a dwarf planet in 2006, some scientists think it deserves to be reinstated. Learn why in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/pluto-is-it-planet-after-all. ...  Show more

Why did Pluto suddenly became a dwarf planet? Why did they change it in 2006, and who defined what makes a planet and what doesn't? Why did we get so excited about new photos of Pluto a few years ago?   ... We explain like i'm five!   Thank you to the r/explainlikeimfive communit ...  Show more