How large is the universe? Where does it begin and end? And how does it expand? These are some of the biggest questions of astronomy. And while humanity is so small that we may never be able to fully understand the true scale of the universe, advancements in technology are helping us to look ever-deeper into the wilds of our existence- towards the edge of our observable universe, known as the Cosmic Horizon. Today, we will analyse the universe, its laws, and its awe-inspiring scale.

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Thumbnail made by Wimptastic: [ Ссылка ]
Captions by Kino Sen: [ Ссылка ]

MUSIC:
Special thanks to Lombus, who allowed me to use his song Doppler Shores in the title screen:
- Source: [ Ссылка ]

Songs by Chris Zabriskie are licensed under a Creative Commons Attribution 4.0 licence [ Ссылка ]
- The Theatrical Poster...: [ Ссылка ]
- Unfoldment, Revealment... [ Ссылка ]
- Cylinder Five: [ Ссылка ]
- Take Off and Shoot a Zero: [ Ссылка ]
- Oxygen Garden: [ Ссылка ]
Artist: [ Ссылка ]

Other songs are from the YouTube Audio Library:
- Landing | Godmode
- Tundras | Amulets
- Dolphin-esque | Godmode
- Space Chatter | Doug Maxwell
- Traversing | Godmode
- At The Precipice of a Dying Light | Dan Bodan

FOOTAGE:
The space scenes in this video were captured using SpaceEngine Pro, a virtual universe simulator:
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SpaceEngine on Steam: [ Ссылка ]

Stock footage provided by Videezy.com

VIDEO CLIPS:
- NASA Redshift Animations: [ Ссылка ]
- Dark Energy Expansion: [ Ссылка ]
- Zooming into the Ultra Deep Field: [ Ссылка ]
- Virtual Clips of Hubble Repair: [ Ссылка ]
- Final Servicing Mission: [ Ссылка ]
- Observable Universe Growing ESA: [ Ссылка ]
- ESO Type 1a supernova [ Ссылка ]
- Redshift Expansion [Creative Commons]: [ Ссылка ]
- Expanding Universe Animation [Hubble ESA]: [ Ссылка ]

IMAGES:
- Observable Universe Logarithmic Illustration: [ Ссылка ]
- Hubble Images: [ Ссылка ]
- Observable Universe Graphic: By Andrew Z. Colvin - Own work, CC BY-SA 3.0, [ Ссылка ]
- Accelerated Expansion Diagram: By Design Alex Mittelmann, Coldcreation, CC BY-SA 3.0, [ Ссылка ]
- Ursa Major: [ Ссылка ]

SOURCES OF INFORMATION:
- Number of Stars in the Universe: [ Ссылка ]
- Einstein and Achievements: [ Ссылка ]
- Edwin Hubble's 1929 Discovery: [ Ссылка ]
- The Hubble Deep Field Images: [ Ссылка ]
- How Much of the Unobservable Universe will we See Someday: [ Ссылка ]
- Some interesting notes on the sphere expanding model: [ Ссылка ]
- Type 1a Supernovae: [ Ссылка ]
- Frieman et al., Dark Energy & the Accelerating Universe: [ Ссылка ]
- Size of the Unobservable Universe [Oxford Physicists]: [ Ссылка ]

TIMESTAMPS:
0:00 Introduction
2:23 Defining the Universe
6:51 The Big Bang
9:12 The Observable Universe
10:53 The Hubble Telescope
11:46 The Hubble Deep Field
16:49 Cosmic Expansion
19:40 Redshift
21:48 The Cosmic Horizon and the Unobservable Universe
25:36 Accelerating Expansion
28:29 Dark Energy
30:14 The End of the Universe

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