Let's Find Out
Let's Find Out▸ Want to leave a tip or connect?: https://linktr.ee/letsfindoutasmr
Description: This is an exploration of the greatest discoveries in cosmology, the great scientists and astronomers behind them, and the still unresolved mysteries of the Universe at the most extreme scales of time, gravity, and distance across the deepest space.

This is part of a larger script I wrote for the James Webb Space Telescope: https://youtu.be/zcTxuQZzJbQ
The Big Bang, Dark Matter, the Cosmic Microwave Background, Cosmic Web Filaments, the End of Greatness, Inflation, Dark Energy, and there’s still so many questions about the nature of our Universe.
Tonight we learn what the current lambda cold dark matter big bang model of the universe says happened from the first few seconds to the first few million years after the universe was thought have come into existence.
We learn what older cosmological theories evolved into and how our conception of light, matter and energy has changed over that last few centuries as our understanding of them has deepened.
We learn what the biggest mysteries of physics and cosmology still are and about the huge gaps in our understanding of the cosmic dark ages, the dark matter halos around nearly all galaxies, and how the still-mysterious phenomena of the big bang, inflation, and dark energy is propelling galaxies apart.
Thanks so much for watching. Let me know what you thought. -Rich
Credits:
NASA
ESA: https://www.esa.int/ESA_Multimedia/Images
ESO: https://www.eso.org/public/videos/archive/category/cosmology/
David Butler (youtube channel I highly recommend for astronomy content): https://www.youtube.com/@howfarawayisit
Alex Filippenko and Lex Fridman: https://youtu.be/thnlEkcXr5w
Timestamps:
0:00 INTRO
1:13 THE FIRST INSTANT AFTER THE BIG BANG
8:56 THE COSMIC MICROWAVE BACKGROUND
13:39 THE FIRST GALAXIES
17:25 THE UNIVERSE ON THE LARGEST SCALES
(THE END OF GREATNESS)
24:16 THE GREATEST QUESTIONS IN COSMOLOGY
34:29 LIGHT AND MATTER
1:01:29 WHAT IS COSMOLOGY?
(A VERY BRIEF HISTORY)
1:09:52 THE EVOLUTION OF TELESCOPES
(ANOTHER VERY BRIEF HISTORY)
1:23:43 EINSTEIN’S UNIVERSE
1:35:22 EDWIN HUBBLE’S UNIVERSE
(BUILDING UPON THE WORK OF DOPPLER, LEVITT, SLIPHER AND OTHERS)
1:51:03 LEMAITRE’S UNIVERSE
(THE PRIEST-PHYSICIST WHO DISCOVERED THE BIG BANG)
1:56:00 ZWICKY’S NON-LUMINOUS MATTER
(DISCOVERY OF DARK MATTER)
2:00:57 PENZIAS AND WILSON HEAR THE
AFTERGLOW OF THE BIG BANG
2:05:25 THE EVOLUTION OF SPACE TELESCOPES
(YET ANOTHER VERY BRIEF HISTORY)
2:21:06 COSMOLOGY BEFORE INFLATION AND DARK ENERGY
2:32:51 INFLATION, THEN DARK ENERGY
(AND WHAT WE STILL DON’T UNDERSTAND
ABOUT THE NATURE OF THE UNIVERSE)
3:03:55 OUTRO: WHERE THIS VIDEO CAME FROM
#space #documentary #sleep #asmr
▸
source
20 Comments
@LetsFindOut1
02/22/2025 - 5:57 AMNew video about the birth of the Solar System:
@allan9603
02/22/2025 - 5:57 AMOf course scientists can't explain what existed before the origin of the Big Bang.
@andreewhitland2153
02/22/2025 - 5:57 AMGod created everything, please don’t believe this BS
@MULUGETAMARKOS-b2i
02/22/2025 - 5:57 AMcan i got the manuscript of this video lecture?
@bluskyz7398
02/22/2025 - 5:57 AMAmazing presentation with so much spectacular information. Kids should see this type of thing – we need for every human being to be in awe of the universe we live in, the planet we live on. If they were, maybe things would be different.
@Jason-o5s
02/22/2025 - 5:57 AMCheer~~~the science of the origin and development of the universe. Modern astronomy is dominated by the Big Bang theory, which brings together observational astronomy and particle physics.😊
@ontologicalornithology
02/22/2025 - 5:57 AMYour videos are always so soothing. Looking forward to your next upload ❤️
@saphyre-l4w
02/22/2025 - 5:57 AMSuch a cozy comfy content 😶🌫 It's great for long winter nights with tea or herbs 🌿
@manavchattwani1
02/22/2025 - 5:57 AMDark Matter Theory: I believe dark matter originates from black holes. The size of a galaxy is influenced by the size of the black hole at its center. I propose that galaxies were formed because the immense gravity of black holes attracted stars, gas clouds, and other matter, drawing them into orbit and thus creating a galaxy.
I think that during the Big Bang, the first black holes were created from supernovae, and these black holes played a crucial role in forming the first galaxies. The mass and size of a galaxy depend on the mass of the black hole at its center.
The reason we don’t see dark matter is that it doesn’t emit or reflect light—it’s invisible to our eyes, but its gravitational effects are detectable. My hypothesis is that dark matter is not a separate substance, but rather, it is the gravitational influence of the black hole. The black hole’s gravity would have pulled in matter, forming stars, galaxies, and possibly the dark matter itself.
This might explain why galaxies formed so rapidly after the Big Bang: the immense gravity of the black holes helped gather matter quickly and created the structure of galaxies. So, in my view, dark matter might be an effect of the black hole’s gravitational pull, and the galaxy’s mass is directly tied to the black hole at its center.
I believe I have a potential answer to the mystery of dark matter—but, of course, I could be wrong, and further research is needed.
@suprita1686
02/22/2025 - 5:57 AM🫦
@РодионЧаускин
02/22/2025 - 5:57 AMAnderson Edward Hernandez Amy Walker Michelle
@nathanpinchak7402
02/22/2025 - 5:57 AMReally enjoyed this one! You're great my man! Awesome job!
@benitofrio
02/22/2025 - 5:57 AMYour content is so great, Rich! And it keeps getting better and better. Love the additional transition and background sounds!
I've listened to this one (and others) so many times! 🙌🏻😴🤘🏻👊🏻
@tori5731
02/22/2025 - 5:57 AMI'm not even a science student but studying this it's way more interesting than history 😭💖🤌🏻
@Seekthetruth3000
02/22/2025 - 5:57 AMSomething coming from nothing makes no sense to me. What is nothing in physics?
@brandonbritt99
02/22/2025 - 5:57 AMI love cosmetology
@MrAndriod123
02/22/2025 - 5:57 AMGood to know inflation has been going on since the beginning of time😅
@TheJtl420
02/22/2025 - 5:57 AMMcCreddy is alive. It's canon
@ArnoldJudasRimmer..
02/22/2025 - 5:57 AMA year later ha.
But imagine the sound the Big Bang would have made?!?
@shanananutbread
02/22/2025 - 5:57 AMR u single asking for a friend