It's time for school! The Astro101 series will cover some of the most important questions in astronomy. In today's lesson, we'll have: What are the different kinds of stars? Why does classification in astronomy make no sense? How the heck do we define a "star", anyway? 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).