How old is the oldest planet? When did the first planets form in the universe? And what about life-supporting worlds? These are some of the most complex questions in extrasolar-planetary science. But by studying the ancient exoplanets in the Milky Way galaxy, we've managed to build up a comprehensive picture of when the genesis planets formed, and what they were like. Those findings make up the content of our video today.

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   • Sleeping Space Playlist  

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SOUNDTRACK (In order):
- Atomic - CO.AG:    • Atomic Futuristic Sci-fi Electronic B...  
- The UFO - CO.AG:    • The UFO -  Documentary Music  
- Drifting at 432 Hz - Unicorn Heads (YouTube Audio Library)
- The Kingdom of Shadows [1hr Soundscape] - CO.AG:    • Haunting Atmospheric Soundscape  -  T...  
- Boundaries - CO.AG:    • Boundaries  -   Dark Haunting Music  ...  
- Just For Jolly - CO.AG:    • Just for Jolly   -     Haunting Atmos...  
- Bodim Moor - CO.AG:    • Bodmin Moor -  Documentary  Music  
- Forever Space - CO.AG:    • Forever Space  -  Futuristic Backgrou...  

CO.AG is an ambient music creator who produces high-quality music for the YouTube community. Check out his channel:    / @co.agmusic  

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...

Stock Footage:
- Videvo: https://www.videvo.net
- Videezy: https://www.videezy.com
- Vecteezy: https://www.vecteezy.com
- Pexels: https://www.pexels.com

SOURCES OF INFORMATION:

- Formation of Planets: https://www.newscientist.com/article/...

- When Did the Universe Have the Right Stuff for Planets? [Space.com]: https://www.space.com/17441-universe-...

- Methuselah Discovery [NASA]: https://www.nasa.gov/centers/goddard/...

- Methuselah Article: https://www.masslive.com/living/2020/...

- First Terrestrials and Metallicity [NASA]: https://www.nasa.gov/centers/jpl/news...

- Kepler-444 / KOI-3158: https://arxiv.org/pdf/1501.07869.pdf

- The First Habitable Worlds [Forbes]: https://www.forbes.com/sites/startswi...

- Metal Creation in Early Universe Galaxies: https://link.springer.com/article/10....

CHAPTERS:
0:00 Introduction
1:37 How Planets Form
8:58 Metallicity
12:52 The Search for Exoplanets
16:30 Methuselah- The Oldest Planet
22:26 Primordial Gas Giant Formation
26:05 Kepler-444- The Oldest Rocky Planets
29:06 The First Habitable Worlds
33:24 Starburst Metal Spreading

(NON-ENGLISH VIEWERS)
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