Beyond the Galaxy #368

May 06, 2016

This week we're looking at astrophysics, zooming out to get a better idea of how universe works and what it might look like. Astrophysicist Ethan Siegel returns to talk about his new -- and first -- book "Beyond the Galaxy: How Humanity Looked Beyond Our Milky Way and Discovered the Entire Universe". And we'll speak with astrophysicist Katie Mack about the discovery of gravity waves, first predicted by Einstein.

This episode is partially hosted by Bethany Brookshire, science writer from Science News. If you're looking for more on gravity waves, check out this great explainer article and video on Science News.


  • Ethan Siegel
  • Katie Mack
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Guest Bios

Ethan Siegel

Ethan Siegel is a theoretical astrophysicist, author, and an award-winning science communicator. He is the author of the 2 books "Beyond The Galaxy: How Humanity Looked Beyond Our Milky Way And Discovered The Entire Universe" and "Treknology: The Science of Star Trek from Tricorders to Warp Drive". He can be found blogging about all things physics on his Forbes blog Starts with a Bang and on the Medium network.

Katie Mack

Dr Katherine (Katie) Mack is a theoretical astrophysicist. Her work focuses on finding new ways to learn about the early universe and fundamental physics using astronomical observations, probing the building blocks of nature by examining the cosmos on the largest scales. Throughout her career as a researcher at Caltech, Princeton, Cambridge, and now Melbourne University, she has studied dark matter, black holes, cosmic strings, and the formation of the first galaxies in the Universe. Katie is also an active online science communicator and is passionate about science outreach. As a science writer, she has been published by Slate, Sky & Telescope,, the Economist tech blog "Babbage", and other popular publications.