AaS! 16: How do spiral galaxies form?

How do spiral galaxies form? How do galaxies form in the first place, anyway? What’s so special about spirals that make them look so cool? I discuss these questions and more in today's Ask a Spaceman! Follow all the show updates at askaspaceman.com. Keep those questions about space, science, astronomy, astrophysics, and cosmology coming to #AskASpaceman on Twitter@PaulMattSutter and Facebook/PaulMattSutter for COMPLETE KNOWLEDGE OF TIME AND SPACE! Music by Jason Grady and Nick Bain. Thanks to Estelle Rinaudo and Theordore Varno for supporting the show!