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0:00 - Introduction
0:33 - The shape of the visible universe
2:33 - What affects the shape of the universe?
5:32 - Three possible forms of curvature of the cosmos
7:17 - Explanation of the geometry of space
10:18 - What should I consider when estimating the mass of the Universe?
12:40 - Examples of methods for determining the density of the Universe
14:00 - How to directly see the curvature of the cosmos?
19:59 - What is the fate of our Universe?
20:56 - Epilogue

Links:
Lawrence Krause on the Universe and its shape: "Lawrence Krauss - Life, the Universe, and...
Why the universe probably is "flat"
Neil Degrasse Tyson on the shape of the Universe: Why the Universe is Flat I The Great Courses

https://wmap.gsfc.nasa.gov/universe/u...
https://wmap.gsfc.nasa.gov/universe/u...
https://astronomy.com/news/2021/02/wh...
https://www.forbes.com/sites/startswi...
https://www. quantamagazine.org/what-shape-is-the-universe-closed-or-flat-20191104/
https://www.worldatlas.com/space/what...
https://astronomy.swin.edu.au/cosmos/...
https://www.space.com/24309-shape-of-...
https://www.sciencealert.com/we-have-...
https://astro.ucla.edu/~ wright/density.html
https://www.astronomy.ohio-state.edu/...
How Do We Know the Universe is Flat?
https://bigthink.com/starts-with-a-ba...
https://www.gresham.ac.uk/watch-now/w...
https://www.space.com/universe-total-...
https://www.esa.int/Science_Explorati... ace_Science/Planck_overview
https://map.gsfc.nasa.gov/mission/sgo...
https://astronomy.swin.edu.au/cosmos/...
https://astronomy.swin.edu.au/cosmos/...
https://www.fox13news.com/news/the-un...
https://astronomy.swin.edu.au/cosmos/...