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.


SOUNDTRACK (In order):

- Atomic - CO.AG: https://youtu.be/deKPhd-yZfY

- The UFO - CO.AG: https://youtu.be/MAC_XKNZk-w

- Drifting at 432 Hz - Unicorn Heads (YouTube Audio Library)

- The Kingdom of Shadows [1hr Soundscape]

- CO.AG: https://youtu.be/Nv_UBIC69aM

- Boundaries - CO.AG: https://youtu.be/2DDtR7G_VEo

- Just For Jolly - CO.AG: https://youtu.be/4D5D3OAuUaU

- Bodim Moor - CO.AG: https://youtu.be/PkX8fl-Huyw

- Forever Space - CO.AG: https://youtu.be/5cKpbh1NrUM

CO.AG is an ambient music creator who produces high-quality music for the YouTube community. Check out his channel: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA


CHAPTERS:

(00:00) Introduction

(01:37) How Planets Form

(08:58) 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

2025-11-10 38 min

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