What lies at the edge of the Solar System? Far beyond the orbit of Neptune and the Kuiper Belt, deep into interstellar space, we find a vast, thick shell of icy space debris. We have never seen it directly, but we know it exists- because it is the source of the most distant comets that we see entering the Solar System. So why is it there? Today we'll find out, in a new episode of #OOTW

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MUSIC:
All music in this video was downloaded from the YouTube Audio Library.
The Six Realms | I Think I Can Help You
Those Things Are More Fun With Other People | pATCHES
Tides | Windows of Ken
An Excuse To Do Less | pATCHES
The Three Elements | I Think I Can Help You
Clouded | Public Memory
Ammil | The Tides
Dusk | DivKid
Growing Space | Astron
Interplanetary Alignment | NoMBe

FOOTAGE:
The 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...

Some scenes were captured using Universe Sandbox
Oort Cloud Simulation: https://steamcommunity.com/sharedfile...
Universe Sandbox: http://universesandbox.com/

Other Videos:
Voyager-1 Launch:    • VOYAGER 1 - Launch (1977/09/05)  
Oort Cloud Shell Image (Creative Commons): https://www.rocketstem.org/2020/01/11...
Timelapse of Comet Lovejoy:    • Time-lapse Footage of Comet C2014 Q2 ...  
NASA Planetary Disc Footage:    • NASA Reveals Alien Composition of 2I/...  
Estuary Footage:    • Estuaries: Where the River Meets the Sea  
How Big is the Milky Way Graphic | NASA (Creative Commons):    • Our Milky Way Galaxy: How Big is Space?  
Observatory Footage from ESA:    • La Silla Observatory UHD Video Compil...  

SOURCES OF INFORMATION:
Oort Cloud In Depth [NASA]: https://solarsystem.nasa.gov/solar-sy...
Oort Cloud Contents and Structure: https://arxiv.org/abs/astro-ph/0512256
Oort Cloud Facts: https://space-facts.com/oort-cloud/
Kuiper Belt: https://solarsystem.nasa.gov/solar-sy...
Sedna: https://en.wikipedia.org/wiki/90377_S...
Siding Spring: https://en.wikipedia.org/wiki/C/2013_...)
Hale Bopp: https://en.wikipedia.org/wiki/Comet_H...
Lovejoy: https://en.wikipedia.org/wiki/C/2011_...)
TAU Spacecraft: https://en.wikipedia.org/wiki/TAU_(sp...)
Whipple Mission: https://ui.adsabs.harvard.edu/abs/201...
Extrasolar Oort Clouds: https://astronomy.com/magazine/ask-as...

TIMESTAMPS
0:00 Introduction
2:01 The Oort Cloud
5:18 The Scale of the Cloud
6:47 Formation of the Oort Cloud
9:33 The Source of All Comets
13:17 The Hills Cloud
14:40 Sedna
16:12 The Outer Oort Cloud
17:13 Siding Spring, Hale Bopp, Lovejoy
19:20 Future Missions to the Oort Cloud
21:46 Extra-solar Oort Clouds