A Historian's Guide to the Galaxy with Sean Johnson
Astronomer Sean Johnson joins us to tell us about the history of the Universe.
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.
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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
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