Supervoids are the massive, empty spaces between galaxy clusters and galaxy filaments. But just because they are empty, doesn't mean they can't be fascinating! They have taught us a great deal about galaxy structures and the early universe, and today we'll be venturing into a few of the biggest!

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Captions by Kino Sen:    / @kinosen4001  

Music, Footage Credits & Sources of Information:

MUSIC:
- Long Walks [Emily A Sprague] - YouTube Audio Library
- Fairy Meeting [Emily A Sprague] - YouTube Audio Library
- A Slow Dream [Emily A Sprague] - YouTube Audio Library
- Devoid [ELPHNT] - YouTube Audio Library
- Rain Cloud Music [Emily A Sprague] - YouTube Audio Library

FOOTAGE:
Many scenes in this video were captured using SpaceEngine Pro, a virtual universe simulator! Get SpaceEngine on Steam and try it for yourself: https://store.steampowered.com/app/31...
http://spaceengine.org/

Much of the stock footage in this video was provided by Videezy.com. Check them out:
https://www.videezy.com/

- Expanding Universe Animation [Hubble ESA]:    • The expanding Universe  
- Dark Energy Expansion:    • Video  
- NASA Illustris Collaboration Simulation:    • Illustris Simulation of the Universe ...  
- Expanding Galaxies:
- Hubble Images:    • A Space Journey (HD)  
- Pink Galaxy Footage:    • Rotating galaxy space scene - Creativ...   - Provided by RoyaltyFreeTube under a Creative Commons License
- Bubble Footage:    • Beachfront B-Roll: Floating Soap Bubb...  

SOURCES OF INFORMATION:
- Redshift Surveys Confirming Voids: https://arxiv.org/pdf/astro-ph/010649...
- Bootes Void Articles: https://web.archive.org/web/200711190...
https://web.archive.org/web/201108071...
- How Large is the Local Group: https://www.universetoday.com/30286/l...
- Dark Matter's Adbsence in Voids: https://www.universetoday.com/16927/d...
- Atomic Density of Intergalactic Space: https://www.physicsoftheuniverse.com/...
- Identification of the KBC Void: https://arxiv.org/abs/1304.2884
https://www.forbes.com/sites/startswi...
- The CMB Cold Spot Supervoid Study [2015]: https://academic.oup.com/mnras/articl...

TIMESTAMPS:
0:00 Emptiness in Space
2:04 Defining a Void
3:52 Mapping Voids Around Us
4:38 How Voids Form
7:05 The Bootes Void
9:16 Voids and Dark Energy
10:33 The Cold Spot
12:10 The KBC Void