Exocast-57b: How big can an exoplanet be?

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This month Hugh, Hannah and Andrew discuss a deceptively simple question about the limits of planetary size… Exocast-57b takes you from measurements of exoplanet radius and mass, the difficulty with the IAU definition of planets, to the formation of brown dwarfs and stars. They even dive into the importance of size on habitability, the size limits of a rocky world compared to a gaseous world, some of the stand out candidates for the “biggest” exoplanet, and whether a planet can ever be bigger than a star (spoiler: yes, but never in mass).

How would you define the biggest exoplanet? Join in the discussion in the comments below, and find us on Twitter. If you want to support the Exocast Podcast then you can Buy us a Coffee, or get your own merchandise at exocast.threadless.com

Exocast is edited by composer/muscian Fergus Hall (https://fergushallcomposer.com)

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