AaS! 125: Does Planet Nine Exist?
Episode description
Why do we think the solar system might have another planet? Why do we think it doesn't? How do test for something that's too far away to see? I discuss these questions and more in today's Ask a Spaceman!
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Music by Jason Grady and Nick Bain. Thanks to Cathy Rinella for editing.
Hosted by Paul M. Sutter, astrophysicist and the one and only Agent to the Stars (http://www.pmsutter.com).