AaS! 179: What are the Alternatives to Dark Matter?

What are some of the problems with dark matter? What about modified gravity? Are there any other solutions? 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, Chris L, Barbara K, Duncan M, Corey D, Justin Z, Nate H, Andrew F, Naila, Scott M, Rob H, Justin, Louis M, Paul G, John W, Alexis, Erin J, Jennifer M, Gilbert M, Joshua, Bob H, John S, Thomas D, Michael R, David B, Frank T, Tim R, 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, COTFM, Stephen S, Ken L, Alberto M, Matt C, Joe R, David P, Ulfert B, Sean M, Edward K, Darren W, Tracy F, Sarah K, Steven S, 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, Colin B, Bruce A, Steven M, Brent B,…