AaS! 137: What's really at the center of a black hole?

What can possibly replace the singularity? What are Planck stars and Gravastars? What's it like to fall into a rotating black hole? 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).