What we perceive to be the edge of our universe is not the actual edge of the universe, with most scientists in agreement that more space lies hidden beyond what we're able to see. Last time out, we travelled to the very edge of our observable universe. But today, we will be going even farther, as we wade out into the darkness of the unobservable universe.

Watch Part 1 (Journey to the Edge of the Universe):    • Journey to the Edge of the Universe [4K]  

If you use these videos for sleeping, check out the Sleeping Space Playlist! It's a collection of my most chilled out and audible videos, suitable for shuffling.
   • Sleeping Space Playlist  

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Soundtrack by CO.AG Music:    / @co.agmusic1823  
- Taboo-Inspired Intro Track:    • Background Music Inspired by -  Taboo  
- Strange Days Ahead:    • Strange Days Ahead  . Electronic Back...  
- The Last Breath:    • The Last Breath -   Haunting Atmosphe...  
- The Monolith:    • The Monolith.  100% Copyright Free Tr...  
- ESP Background Track:    • ESP.  Edit Background Track  CO.AG  
- Encounter:    • Encounter  -   Documentary  Music  
- Direct Space:    • Direct Space edit mix CO.AG Music  
- Do You Understand:    • Do You Understand  -  Documentary  Music  
- Phonon:    • Phonon   CO.AG Music  
- Dark Enigma 13:    • This Dark Enigma 12  Dark Haunting Music  
- Book of the Dead:    • Dark Haunting Music   -  The Book of ...  

FOOTAGE:
The space scenes in this video were captured using SpaceEngine Pro, a virtual universe simulator:
http://spaceengine.org/
Get SpaceEngine on Steam: https://store.steampowered.com/app/31...

Other graphics, including images, videos and visualisations, are public domain content provided by NASA and the ESA.
NASA GSFC: https://www.nasa.gov/goddard
ESA: https://www.esa.int

The Logarithmic Observable Universe Graphic was provided by the following channel:    / @universemaps  

Multiple graphic sequences were provided by Vecteezy.com
Pro License Holder: https://www.vecteezy.com/members/sea-...

SOURCES OF INFORMATION:
- Critical Density Definition: https://astronomy.swin.edu.au/cosmos/...
- Old Critical Density Estimates: http://hyperphysics.phy-astr.gsu.edu/...

- Our Flat Universe: https://www.symmetrymagazine.org/arti...

- Multiply Connected Shapes: https://mathematica.stackexchange.com...
- Time in a Toroidal Universe: - Torroidal Universe with Time: https://evolvingsouls.com/blog/toroid...
- Why the Universe Probably Isn't Shaped Like a Donut [Forbes]: https://www.forbes.com/sites/startswi...

- ESA Interview with Joseph Silk re the Size & Shape of the Universe: https://www.esa.int/Science_Explorati...
- Oxford Estimates for the Size of the Universe: https://arxiv.org/pdf/1101.5476.pdf

- Cosmic Inflation & Before the Big Bang [Forbes]: https://www.forbes.com/sites/startswi...
- Primordial Gravitational Waves / GWB: http://www.icg.port.ac.uk/~mikewang/M...

- Dark Energy & Dr. Adam Riess' Quote: https://sciencesprings.wordpress.com/...

Chapters:
0:00 Welcome Back
1:50 Beyond the Cosmic Horizon
5:42 The Shape of the Universe
7:45 Universal Curvature
12:35 Critically Dense Flat Universe
15:18 Drawing Triangles on the CMB
18:52 The Flatness Problem
22:19 Multiply Connected Universe
27:19 4D Hyper Torus
29:17 Curved on a Large Scale?
31:50 Cosmic Inflation
37:09 Closing Statements

(NON-ENGLISH VIEWERS)
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