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 “How did our solar system form?” and “What is a galaxy?” 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. 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! Show Notes 2:47 - Sean Johnson explains why Astronomy 4:03- What is a Solar System? 5:06 - What came first? Solar System or Galaxy? 7:04 - What is dark matter? 11:07 - The Sun fuses Hydrogen 13:00 - How are exo-planets and how are they discovered? 15:37 - Nasa’s Next Generation Telescope and what can be seen 21:00 - Galaxies and spiral arms. 23:00 - Quasars and Pulsars 28:00 - How do we know the universe is so big? 31:00 - Seeing into the center of the Galaxy 34:00 - Is the universe quiet? 35:00 - Gravitational Waves - Ripples in space-time 43:00 - Neutrinos 49:00 - What do we know what we need for life? 50:00 - Pet Sci-Fi movie fails Check out Astrobites This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit historicly.substack.com/subscribe