AaS! 144: Astro101 Part 6 - What are Galaxies?

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 is a galaxy? What does our own galaxy look like? What are the different kinds of galaxies, and how did they get that way? I discuss these questions and more in today's Ask a Spaceman! Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Watch on YouTube: http://www.youtube.com/PaulMSutter Read a book: https://www.pmsutter.com/books  Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: Justin G, Matthew K, Chris L, Barbara K, Duncan M, Corey D, Justin Z, Neuterdude, Nate H, Andrew F, Naila, Aaron S, Scott M, Rob H, David B, Frank T, Tim R, Alex P, Tom Van S, Mark R, Alan B, Craig B, Richard K, Steve P, Dave L, Chuck C, Stephen M, Maureen R, Stace J, Neil P, lothian53 , COTFM, Stephen S, Ken L, Debra S, Alberto M, Matt C, Ron S, Stephen J, Joe R, Jeremy K, David P, Norm Z, Ulfert B, Robert B, Fr. Bruce W, Catherine R, Nicolai B, Sean M, Edward K, Callan R, Darren W, JJ_Holy, Tracy F, Tom, Sarah K, Bill H, Steven S, Jens O, Ryan L, Ella F, Richard S, Sam R, Thomas K, James C, Jorg D, R Larche, Syamkumar M, John S, Fred S, Homer V, Mark D, Brianna V, Becky L, Colin B, Arthur, Bruce A, Steven M, Brent B, Bill E, Jim L, Tim Z, Thomas W, Linda C, Joshua, David W, Aissa F, Tom G, and Marc H! 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).