The Cosmic Scale

How large is the universe? Where does it begin and end? 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 universe's true scale, advancements in technology are helping us to look ever-deeper into space, towards the edge of our observable universe known as the Cosmic Horizon. Today, we will get to know our universe, its laws, and its awe-inspiring scale above all.

SOUNDTRACK:

Special thanks to Lombus, who allowed me to use his song Doppler Shores in the title screen:

https://lombus.bandcamp.com/track/doppler-shores

Songs by Chris Zabriskie are licensed under a Creative Commons Attribution 4.0 licence (https://creativecommons.org/licenses/by/4.0/ )

- The Theatrical Poster...: http://chriszabriskie.com/vendaface/

- Unfoldment, Revealment... http://chriszabriskie.com/reappear/

- Cylinder Five: http://chriszabriskie.com/cylinders/

- Take Off and Shoot a Zero: http://chriszabriskie.com/stuntisland/

- Oxygen Garden: http://chriszabriskie.com/divider/

Artist: http://chriszabriskie.com/

Other songs are from the YouTube Audio Library

CHAPTERS:

(00:00) Introduction

(02:23) Defining the Universe

(06:51) The Big Bang

(09:12) 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