Welcome to Cosmology and its Fundamental Observations

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  • Опубликовано: 24 дек 2024

Комментарии • 110

  • @JasonKendallAstronomer
    @JasonKendallAstronomer  2 месяца назад +24

    Errata: at 39:10, I mis-spoke, they were at Bell Labs in Holmdell, not Princeton. Please watch the updated version here; ruclips.net/video/wjCphvgCdkA/видео.html

  • @petachad420
    @petachad420 Месяц назад +9

    This came up on autoplay when I was asleep and I had the craziest dream ever

  • @ElectricEric2030
    @ElectricEric2030 4 месяца назад +72

    00:03 🎵 Introduction to Cosmology
    00:45 📊 Measuring the Universe
    02:12 📚 Introduction to the Textbook
    03:22 🔍 Units of Measurement
    09:55 🕰 Cosmological Time Scales and Units of Energy and Power
    11:42 ⭐ Astronomical Units of Energy and Distance
    12:20 🔍 The Importance of Small Scales in Cosmology
    16:42 📊 Fundamental Constants in Cosmology
    19:37 🤖 Introduction to Plon Units
    20:06 💡 Understanding Plon Units
    23:00 📊 Geometrization of the Universe
    25:03 🌠 Brief History of Cosmology
    29:46 🌟 Ancient Greek Cosmology and the Sun-Centered Universe
    30:40 🌟 The Rise of Modern Astronomy and the Challenge to Geocentrism
    31:20 🌟 The Development of Newton's Laws of Motion and Universal Gravitation
    34:00 🌟 The Discovery of Stellar Parallax and the Measurement of Distance
    35:20 🌟 The Development of Einstein's Theory of General Relativity
    37:00 🌟 The Discovery of the Expanding Universe and the Big Bang Theory
    39:51 🚀 The Discovery of the Accelerating Universe
    41:28 🌠 The Golden Age of Observational Cosmology
    43:15 🌃 Oler's Paradox and the Night Sky
    50:38 🌠 Calculating the Number of Stars in a Cylinder
    52:41 🌠 The Distance We Can See
    54:04 🌠 The Brightness of the Paved Sky
    59:21 🌠 Assumptions and Limitations
    01:09:31 🤖 Isotropy and Homogeneity in the Universe
    01:14:02 🛡 Observations of Isotropy and Homogeneity
    01:16:15 🔭 The Cosmic Microwave Background and Isotropy
    01:18:40 🚀 Density of the Universe
    01:20:20 🌐 Homogeneity and Isotropy of the Universe
    01:23:20 🌠 The Cosmological Principle and the Steady State Model
    01:25:20 🌟 The Specialness of Humanity and the Universe
    01:28:00 🙏 Introduction and Context
    01:29:21 📚 Chapter 2: Red Shift
    01:34:09 🔍 The Discovery of Red Shift
    01:46:22 🚀 Cosmological Principle and Hubble's Law
    01:51:08 📏 Expansion of Space and Scale Factor
    01:53:01 🚀 Hubble Parameter and Velocity
    01:55:59 🤖 Hubble Time and its Significance
    01:57:21 ⭐ Oldest Stars and their Metallicity
    01:59:24 🌠 Globular Clusters and their Ages
    02:00:05 🤔 Population 3 Stars and Binary Systems
    02:01:00 🕰 Hubble Time and the Expansion of the Universe
    02:02:10 🔍 The Hubble Parameter and the Expansion of the Universe
    02:05:20 🔭 Ober's Paradox and the Age of the Universe
    02:07:06 🚀 The Steady State Model and the Big Bang
    02:09:07 📊 Mathematics of the Steady State Model
    02:11:10 🌐 The Volume of the Universe and the Steady State Model
    02:13:12 🚫 The Big Bang Prevails
    02:14:47 🔭 The Steady State Model and the Big Bang Theory
    02:16:40 🌐 The Nature of the Big Bang and the Cosmic Horizon
    02:20:08 🔍 The Redshift and the Big Bang Theory
    02:22:20 📚 Introduction to Chapter 2 of Barbara Ryden's Introduction to Cosmology
    02:24:38 🤖 Fermions, Bosons, and Quarks
    02:30:16 💼 Qu and Hadrons
    02:32:09 ⏰ Protons and Neutrons
    02:33:43 🌠 The Building Blocks of the Universe
    02:41:46 🤔 The Mass of Neutrinos
    02:42:40 🤖 Photons and their Properties
    02:47:03 🔥 Black Body Spectrum and Energy Density
    02:50:22 📊 Number Density of Photons and the Cosmic Microwave Background
    02:51:43 🌟 Photons and the Sun
    02:53:07 🔮 Dark Matter
    02:59:05 🔮 Properties of Dark Matter
    03:01:21 🤖 Introduction and Acknowledgments
    03:03:35 💡 Properties of Light
    03:05:00 🔍 Properties of Light (continued)
    03:06:32 🚀 History of the Cosmic Microwave Background
    03:10:55 🚀 The Discovery of the Cosmic Microwave Background
    03:14:09 🔭 The Confirmation of the Big Bang Theory
    03:16:25 📊 The WMAP Mission
    03:29:40 🔥 Photon Creation and Annihilation
    03:37:30 🌌 The Emergence of Matter and the Cosmic Microwave Background
    03:39:06 🔭 The Cosmic Microwave Background and its Properties
    03:39:20 🔭 Primordial Light Barrier and Recombination
    03:41:27 📊 Deriving the Temperature of the Cosmic Microwave Background

  • @ilaysdalays
    @ilaysdalays 3 месяца назад +50

    Woke up while this was playing and I simply just watched everything bc it was too interesting

  • @SquidySSS
    @SquidySSS 3 месяца назад +186

    Auto play brought me here

    • @JasonKendallAstronomer
      @JasonKendallAstronomer  3 месяца назад +8

      Stay for the cookies.

    • @SquidySSS
      @SquidySSS 3 месяца назад +2

      @@JasonKendallAstronomer 🍪

    • @NephiylusBaphson
      @NephiylusBaphson 2 месяца назад +9

      Same! It's like the fourth time I've ended up here. For some reason RUclips has decided that this video, Portal/Halflife lore and that one Hbombrrguy plagiarism video are just what I need at night. And it would be absolutely correct.

    • @razercp9322
      @razercp9322 Месяц назад +1

      @@NephiylusBaphson I always get professor Dave’s debunk videos when I gts

    • @Varrothegoat
      @Varrothegoat Месяц назад +1

      @@SquidySSS mine did the info made me stay tho 😂😂

  • @s0urp0wer5
    @s0urp0wer5 13 дней назад

    Anyone else find videos like this with basic microphone and zero music to be the most relaxing content on youtube?

  • @morganseppy5180
    @morganseppy5180 2 месяца назад +5

    Thank you for providing higher education for free for anyone who wants to learn

  • @esbenkran
    @esbenkran 2 месяца назад +1

    I feel like you can make a great book out of all this, Jason.

  • @saultyops8612
    @saultyops8612 2 месяца назад +11

    Who else left their RUclips on autopkay

  • @Tribecasoothsayer
    @Tribecasoothsayer 6 месяцев назад +66

    I’m in just a short amount. But I already realize This is an excellent presentation and I’m excited to listen to the rest. Thank you!

    • @JasonKendallAstronomer
      @JasonKendallAstronomer  6 месяцев назад +11

      Glad you enjoyed it!

    • @DrDeuteron
      @DrDeuteron 6 месяцев назад +4

      This stuff is top notch. Perfect for layman, with technical accuracy and historic context, and that’s coming from a particular nuclear pro.

    • @Truth_Teller_101
      @Truth_Teller_101 6 месяцев назад +5

      If Jason Kendall had been my professor in college, I would have gotten an A in Astronomy instead of the C- I eeked away with.

    • @victorhansson3410
      @victorhansson3410 4 месяца назад +1

      @@Truth_Teller_101i would've won a Nobel prize, or several.

  • @stefanjanik3560
    @stefanjanik3560 Месяц назад +1

    Like all the other comments I am glad I found these. We need a Jason in Scotland teaching the public astronomy and cosmology.

  • @WAGNERMJW
    @WAGNERMJW 2 месяца назад +2

    So then where is everyone else if we are not special?

  • @ДенисПлахотя-о2ч
    @ДенисПлахотя-о2ч 4 месяца назад +1

    I'm lucky to find such an interesting channel to dive in, thanks for invitation , it's an honor for me.

  • @dexter8705
    @dexter8705 2 месяца назад +1

    Absolutely love your videos, one question about redshift and spacetime curvature,
    So distances increase hence spaghettification, so wether entering the gravitational field or leaving the gravitational field these distances increase. That's very prominent in a black holes gravitational field, so it's safe to assume these distances increase the same for a galaxies gravitational field? You would measure redshift because of this distance increase?
    I don't wanna call it expansion of distance/space because this is gravitational "expansion" of space and not "cosmological" expansion of space or redshift.
    So 2 rockets travelling one in front of the other at the same velocity/acceleration from our galaxy to the next galaxy the distance between the 2 rockets increase the entire trip leaving our galaxy and still increase distance entering the next galaxy, how is this not proof that this "expansion " is gravitational and not cosmological?
    I know there is a brief moment where these 2 rockets travelling parallel to a galaxy/gravitational field DIRECTLY perpendicular to the gravitational field the distance between the 2 rockets slightly decrease for a brief moment then the distance between the rockets go back to increasing.
    This is where I would say if you replace the rockets with light/photon/em wave, so where the distances increase in the gravitational field the light would be stretched/redshifted and where the distance is decreased perpendicular to the galaxy the light would be blue shifted for a brief moment.
    So for the trip light is being redshifted 99% of the time based only on gravity.
    Doesn't this imply a steady state model considering all that redshift was caused by gravity?

  • @ServoSambo
    @ServoSambo 5 месяцев назад +5

    Hi Jason. I’ve been listening to your lectures for many years and am so thankful you are so generous with your knowledge and time. Thank you.

  • @Elegant-Capybara
    @Elegant-Capybara 6 месяцев назад +39

    Thank you for your awesome work. While RUclips has awesome channels like PBS Space Time, Cool Worlds etc, they aren't structured. This will be invaluable for anyone trying to learn cosmology and Astronomy in a structured manner.

  • @funkbungus137
    @funkbungus137 Месяц назад

    Oh boy, oh boy… what have I found here? Thank you for doing this!

  • @lorainecross
    @lorainecross 3 месяца назад +1

    What edition are you using for this series? I would like to follow along.

  • @bohol_netherlands
    @bohol_netherlands 5 месяцев назад +1

    Love the first lecture. Thanks Jason, for sure will listen the others. Great way to fast gain insights for someone that just started on learning Cosmology / Astronomy.

  • @BillyLobster
    @BillyLobster 5 месяцев назад +1

    Thanks!

    • @JasonKendallAstronomer
      @JasonKendallAstronomer  5 месяцев назад

      Welcome! And thank you for your contribution! You’re the first one!

  • @Peremptor
    @Peremptor 4 месяца назад

    Excellent distillation of fundamental principles.

  • @HoTTT_cock_Rooster_Sauce
    @HoTTT_cock_Rooster_Sauce 3 месяца назад

    Is light year measurement different in places with time dilation , zero graity space.

  • @smartassdroner739
    @smartassdroner739 3 месяца назад

    When you say around 17:11 that's the ancients thought it was constant, could you elaborate which ancients had this knowledge?

    • @JasonKendallAstronomer
      @JasonKendallAstronomer  3 месяца назад +1

      It is fairly well known that in the history of understanding the speed of light, there was no one prior to attempting to measure it who did not think that light had any other speed other than instantaneous. It wasn’t until 1676 that Ole Romer discovered that light does not travel instantaneously and 1865 with James Clerk Maxwell understanding that light was electromagnetic wave that traveled at the speed C. Ask yourself this question: how would you even perceived any speed of light in a pre-technology era where the concept of the electron and the proton and even most areas of modern physics did not yet exist. We have a very parochial attitude because of our deep understanding of technology. It is nearly impossible to understand how people lived differently or even survived without all the modern is that we have today.

  • @NephiylusBaphson
    @NephiylusBaphson 2 месяца назад +1

    I never would've thought to add magnitude prefixes to time units, but is completely reasonable at cosmic scales.

  • @fatbeets4781
    @fatbeets4781 4 месяца назад

    Penzias and Wilson were at Bell Labs in Holmdel. Not Princeton.

  • @themark462
    @themark462 5 месяцев назад

    Thank you for making this video. I love watching astronomy videos and this is a great refresher of the fundamentals.

  • @Bionic_Rob
    @Bionic_Rob 6 месяцев назад +3

    Hi Jason, been listening to you for awhile now. Also Dr Green and Dr Susskind from Stanford. You are blessed by God to have such a good mind and many other gifts. Loving your work on Cosmology and your approach to science in particular astronomy. From the quantum world to the macro universe. For me I'm filled with wonder and thankfulness to God for my life. So interesting to hear of the creation of elements, quantum fields, universal forces and the role they play in creation. Mind boggling isn't it? Look forwards to continuing to listen and watch your work and explanations. For me as I sit here and look out across the bay and listen to the birds, feel the breeze and the warmth of our Sun. I am so grateful to God and for his the salvation thru Jesus. Keep up the good work mate.

  • @theplinkerslodge6361
    @theplinkerslodge6361 5 месяцев назад +2

    To me, Dr. Kendall injects the right amount of wonder and enthusiasm into the topic that if you took a step or two back, everyone should be blown away by. Don't stop being amazed! The Universe is cookie crazy amazing, embrace that...

  • @daddust
    @daddust 3 месяца назад

    My kid says he wants to be an astrophysicist but he watches game videos, told him he needs this series as basics

  • @sayantanghosh000
    @sayantanghosh000 5 месяцев назад

    Great and useful lecture l, Could you please cover the entire book including cmb anisotrpy as there is almost no good resource for cosmology for graduate of undergard cosmology. Thanks again 🙏🙏

  • @instantaneousvisceraloblit7081
    @instantaneousvisceraloblit7081 Месяц назад +1

    Holy crap, no wonder I had weird dreams...

  • @heidannazakami6288
    @heidannazakami6288 Месяц назад +2

    When I wake up from my sleep, suddenly im in the middle of physics class.

    • @heidannazakami6288
      @heidannazakami6288 Месяц назад

      And imma subs you for my lullaby, lol

    • @ascenderx
      @ascenderx 29 дней назад

      Same bro wtf..
      I remember I was watching veritasium before falling asleep.

  • @deltaskyhawk
    @deltaskyhawk 5 месяцев назад

    What if speed of light slows down with Distance?

  • @bsbdptsd
    @bsbdptsd 4 месяца назад

    You sir did an amazing work!

  • @PepekBezlepek
    @PepekBezlepek 3 месяца назад +1

    I woke up 2h45m into this video an I had the CRAZIEST dreams haha ♥

  • @genericpoptart1
    @genericpoptart1 6 месяцев назад

    Its my love for this subject the brings me back to Elite Dangerous over and over again. Its like an interactive telescope of our galaxy.

  • @ramlakkan9056
    @ramlakkan9056 6 месяцев назад +2

    Great video
    Thank you 😊

  • @Truth_Teller_101
    @Truth_Teller_101 6 месяцев назад +3

    I had a question about radio galaxies. I tuned into one and all I got was static. Why do aliens play such lousy music?

    • @rrj6068
      @rrj6068 6 месяцев назад

      Because not all aliens are hip like we are .......

    • @genericpoptart1
      @genericpoptart1 6 месяцев назад

      That with a whole sector of space with systems named HIP something or other😅

  • @josephshaff5194
    @josephshaff5194 Месяц назад

    It's ashame you're not on Udemy.
    I like to post the courses I take as some are not found at Universities or Colleges, some of the more technically applied subjects. For the longest time I couldn't find a Python course. Now it's specialized Higher CAD Software and accredited Physics Evening Programs that will lead to PhD later. Life is like a game of Chess sometimes careful consideration to the moves you make.

  • @mariabhan9545
    @mariabhan9545 6 месяцев назад +4

    Hi! Just want to say,
    Your videos have given me SO MUCH happiness, peace, knowledge, joy, better sleep, and more. Thank you, thank you, thank you!
    If I knew more people, I would share your channel with them.
    Just know, your passion and work is incredibly meaningful and valuable and brings so much joy to many people!!!!
    I am honestly shocked that you do not have more subscribers/views- but I GUARANTEE you that gold will always shine through and so will you!! Your channel is invaluable. Your students must be so lucky to have you.

  • @anotherplatypus
    @anotherplatypus 5 месяцев назад

    I watched a Kip Thorne vid.. he was talking to 18 year old freshman college students..
    The dude tossed out a random fact.
    A black hole's diameter is longer than its permiter due to the gravitational warping of space.
    he was like shrugs Einstien understood the definition of pi is BS because of gravitational influence.
    It's like Kip.. lets jump back to the whole diameter longer than circumference thing... he blew right past it

  • @marcuspaul4319
    @marcuspaul4319 25 дней назад

    The algorithm has decided that I must science today

  • @adamcahill6294
    @adamcahill6294 3 месяца назад

    This was playing when i woke up and i feel like ive downloaded something after mad dreams

  • @SashaMilos-gd4ln
    @SashaMilos-gd4ln Месяц назад +1

    Why are we here ?
    Chocolate for sure!

  • @Sourcecode01
    @Sourcecode01 5 месяцев назад

    We are but a part of the whole, we will never know it all yet still, I enjoy the human advancements.

  • @jameshayes729
    @jameshayes729 5 месяцев назад

    Brilliant 😮

  • @josephshaff5194
    @josephshaff5194 Месяц назад

    At least we have an agency Dept. though.

  • @edd.
    @edd. 6 месяцев назад +1

    Awesome!! I love these long videos!!

  • @DBFIU
    @DBFIU 2 месяца назад

    Wow ❤

  • @toms-cubes-and-games
    @toms-cubes-and-games 6 месяцев назад +5

    Succinct, comprehensive and awesome.
    Thanks, Dr/Prof./Mage Kendall 👌👍🙏

    • @JasonKendallAstronomer
      @JasonKendallAstronomer  6 месяцев назад +4

      Happy to prestidigitate these conspicuous attempts at erudite colloqualizations.

    • @Tribecasoothsayer
      @Tribecasoothsayer 6 месяцев назад +1

      Lol, the humor! I would love to be in your class, prof. Kendall

    • @Truth_Teller_101
      @Truth_Teller_101 6 месяцев назад +1

      People are tired of either all the AI garbage videos that spend 15 minutes telling you stuff you learned in 6th grade, or the channels that want you to think everything is proof of aliens. Once real astronomy/cosmology fans discover this channel it will blow up like Betelgeuse.

    • @JasonKendallAstronomer
      @JasonKendallAstronomer  6 месяцев назад +2

      Hey thanks for that. In order to help it out, it’d be great if y’all shared it around on social media. I have noticed that of my videos that get lots of hits, it’s the ones that’ve been shared from external sources that generate the most traffic. The YT algorithm feeds off interconnectivity. More equals MOAR!

    • @Truth_Teller_101
      @Truth_Teller_101 6 месяцев назад

      Will do, but since YT changed their algorithm it's very difficult for small channels to gain traction anymore. You might consider doing simultaneous uploads to places like Rumble to help drive traffic, and I've heard that doing those shorts helps you get recommended more by YT.

  • @DJR000
    @DJR000 5 месяцев назад +4

    Here to sleep

  • @simrcchannel
    @simrcchannel 3 месяца назад

    new lecture❤

  • @effortless4588
    @effortless4588 2 месяца назад

    Now i could get Goku to 7d multiversal

  • @megakeenbeen
    @megakeenbeen 5 месяцев назад

    Great find, this channel

  • @michaeld8304
    @michaeld8304 4 месяца назад

    THe presenter/teacher Sounds kind of like "Ciity Planner Plays" :)

  • @josephshaff5194
    @josephshaff5194 Месяц назад

    Answers to the Universe.
    And you have only 30,000 Followers ?
    I'll have to watch it again fell asleep 1/2 way through. At least maybe I can get a jump on some concepts. I really appreciated learning about making the constants = 1. Should like to work through those. Most don't like math. Neighbor just freaked out on me. lmao.
    Heck most don't even know what Cosmology is. lol.

    • @JasonKendallAstronomer
      @JasonKendallAstronomer  26 дней назад

      Thanks, and glad you’re enjoying it!

    • @josephshaff5194
      @josephshaff5194 22 дня назад

      @@JasonKendallAstronomer gotta break and pick up Blender we can put formulas in it now for demos! Then I can get back to school. After review of C I

  • @Jckd_0_Lntrn
    @Jckd_0_Lntrn 6 месяцев назад

    Hey, I'm new here, and I'm only 30 seconds deep, but I know I'm going to absolutely cherish this

  • @troyjacobs8530
    @troyjacobs8530 3 месяца назад

    Thanks for making this :)

  • @kohakumina484
    @kohakumina484 4 месяца назад

    Best sleeping pill everrrr