A Historian's Guide to the Galaxy with Sean Johnson

We have studied many events in human history, we have delved a little bit into humanity before history, but today, we decided to learn more about time and space itself. Sean Johnson, a professor of Astronomy from the University of Michigan joins us to talk to us about the history of the universe. We answer questions like &#8220;How did our solar system form?&#8221; and &#8220;What is a galaxy?&#8221; and how big is the universe? It is the episode that answers questions about Life, Universe and Everything and we end with pet irritants on science fiction movies. <br/><br/>Historic.ly is an entirely listener supported publication. This means we can talk about anything without worrying about offending our corporate overlords. But, we need your help! Please become a paid subscriber!<br/><br/>Show Notes<br/><br/>2:47 - Sean Johnson explains why Astronomy<br/><br/>4:03- What is a Solar System?<br/><br/>5:06 - What came first? Solar System or Galaxy? <br/><br/>7:04 - What is dark matter?<br/><br/>11:07 - The Sun fuses Hydrogen<br/><br/>13:00 - How are exo-planets and how are they discovered?<br/><br/>15:37 - Nasa&#8217;s Next Generation Telescope and what can be seen<br/><br/>21:00 - Galaxies and spiral arms. <br/><br/>23:00 - Quasars and Pulsars<br/><br/>28:00 - How do we know the universe is so big?<br/><br/>31:00 - Seeing into the center of the Galaxy<br/><br/>34:00 - Is the universe quiet?<br/><br/>35:00 - Gravitational Waves - Ripples in space-time<br/><br/>43:00 - Neutrinos<br/><br/>49:00 - What do we know what we need for life? <br/><br/>50:00 - Pet Sci-Fi movie fails<br/><br/>Check out <a target="_blank" href="https://astrobites.org">Astrobites</a> <br/><br/>Get full access to Historic.ly at <a href="https://www.historicly.net/subscribe?token=eyJ1c2VyX2lkIjoyMjI3OTU2LCJpYXQiOjE2NjAxMTEwODQsImV4cCI6MTY2MjcwMzA4NCwiaXNzIjoicHViLTgwNzkiLCJzdWIiOiJjaGVja291dCJ9.rcfviPYZ__ffmcyN_hfBc8dZWUQ8U662073uJSsz7rY&#38;utm_medium=podcast&#38;utm_campaign=CTA_4">www.historicly.net/subscribe</a>