The radius of the Earth is over 6,000 kilometers, but&nbsp;<a href="https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole" rel="noopener noreferrer" target="_blank">the deepest</a>&nbsp;we've ever dug below the surface is only about 12 km.&nbsp;Yet we have a quite reliable idea of the structure of the Earth's interior -- inner core, outer core, mantle, crust -- not to mention pretty good pictures of what's going on inside some other planets. How do we know those things, and what new things are we learning in the exoplanet era? I talk with astrophysicist and planetary scientist Sabine Stanley about how we use gravitation, seismology, magnetic fields, and other tools to learn what's happening inside planets.Blog post with transcript: <a href="https://www.preposterousuniverse.com/podcast/2024/01/29/264-sabine-stanley-on-whats-inside-planets/" rel="noopener noreferrer" target="_blank">https://www.preposterousuniverse.com/podcast/2024/01/29/264-sabine-stanley-on-whats-inside-planets/</a>Support Mindscape on&nbsp;<a href="https://www.patreon.com/seanmcarroll" rel="noopener noreferrer" target="_blank">Patreon</a>.Sabine Stanley received a Ph.D. in geophysics from Harvard University. She is currently a Bloomberg Distinguished Professor at Johns Hopkins University. She has been awarded the William Gilbert Award from the American Geophysical Union. Her recent book is&nbsp;<a href="https://www.press.jhu.edu/books/title/12879/whats-hidden-inside-planets" rel="noopener noreferrer" target="_blank">What's Hidden Inside Planets?</a><ul><li><a href="https://sabinestanley.com/" rel="noopener noreferrer" target="_blank">Website</a></li><li><a href="https://eps.jhu.edu/directory/sabine-stanley/" rel="noopener noreferrer" target="_blank">Johns Hopkins web page</a></li><li><a href="https://scholar.google.ca/citations?user=a98_x2AAAAAJ&hl=en" rel="noopener noreferrer" target="_blank">Publications from Google Scholar</a></li><li><a href="https://en.wikipedia.org/wiki/Sabine_Stanley" rel="noopener noreferrer" target="_blank">Wikipedia</a></li></ul>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.

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264 | Sabine Stanley on What's Inside Planets

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas