Cosmic Inflation and the Origin of the Universe
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- Опубліковано 25 тра 2024
- Watch the whole series here: Big Bang Cosmology: the Origin and Fate of the Universe: Astronomy class William Paterson University: • Big Bang Cosmology: th...
This is part of my complete intro Astronomy class that I taught at Willam Paterson University and CUNY Hunter. If you want to watch all the videos in the correct order, please visit my website at www.jasonkendall.com
The Inflationary Epoch happened or something nearly exactly like it, happened when the universe was extremely young. During the Grand Unified Theory (GUT) Era, the universe became the nearly flat, critical-density Cosmos we see today. In order to understand it, we have to bring in an incomplete theory: Quantum Gravity. We use this to approximate the wild phase transitions that must have occurred in order to force the expansion of space at speeds exponentially greater than light! From an early quantum foam, arose a false-vaccuum that contained all the energy of the cosmos. Oddly enough, this epoch can be observed as effects of gravitational waves on CMB. The Inflationary Epoch solves a number of problems associated with the Standard Big Bang model. It also raises some wild questions about the nature of the origin of the cosmos.
Supplement the videos with OpenStax Astronomy
openstax.org/books/astronomy/...
29: The Big Bang
simple.wikipedia.org/wiki/Inf...)
The basics
en.wikipedia.org/wiki/Inflati...
Inflationary epoch
en.wikipedia.org/wiki/Inflati...)
Cosmological Inflation
en.wikipedia.org/wiki/Friedma...
Critical Density
en.wikipedia.org/wiki/Grand_U...
Grand Unified Theory (GUT)
simple.wikipedia.org/wiki/Gra...
Grand Unified Theory (GUT): elementary...
en.wikipedia.org/wiki/Quantum...
Quantum Gravity
simple.wikipedia.org/wiki/Qua...
Quantum Gravity: simpler...
en.wikipedia.org/wiki/Phase_t...
Phase Transition
en.wikipedia.org/wiki/BICEP_a...
BICEP2 attempt to see effects of gravitational waves on CMB
en.wikipedia.org/wiki/False_v...
False Vacuum
en.wikipedia.org/wiki/Quantum...
Quantum Foam - Наука та технологія
Please see my updated version of this video here: ua-cam.com/play/PLyu4Fovbph6dSGHJOP3o171TON6rLyN6w.html
Okay Jason, we will write you a comment :-) I am obsessed with videos about the universe and seek to understand it deeply. I've been greatly appreciative of your work and have almost watched every one of your videos. I listen to them nightly as I fall asleep, such as right now, and let my mind drift into the possibilities of astrophysics and all that pertains to it. Thanks again and hope you are having a wonderful life
Oh, and one more thing, I like you exponentially better than Neil deGrasse Tyson. his voice makes me want to puke after a couple hours of listening to him, and so far I'm about 20 hours deep on your videos and love every syllable. Keep being yourself
Awesome, thank you!
Your lectures are amazing!
15:23 my grandfather Methusalem from East Jerusalem has been balancing a pencil on the tip of his finger since the day of creation 13.5 billion years ago, and is still going strong. I once asked him if he knew what a pencil can be good for, but unfortunately his hearing has deteriorated in recent million years, and all he said: Get me please a glass of water. Which I did.
What are people watching?? How is it possible you don't have 20 times more views and subscribeers? Such a quality and pleasure to listen.
As one of those early neutrinos, moving through this inflating space/time feels the same as that time I got stuck in a black hole for a while; it doesn't matter which direction I go, I always get further away from where I want to be.
Hello Jason, thank you immensely for the course which is at the right level of deepness for me, I could finally understand some cosmic history and dynamics, relating it with the necessary mathematic.
Great to hear!
This will always be beyond my comprehension. The infinitesimal to universe size in the smallest fraction of time just doesnt compute🤯😅
Ha, I too find myself at quiet times during my day attempting to think 🤔 about the endlessness of it all and wrap my mind around it. Sort of like a mathematical equation where you're adding the product of rock 🪨 & tree 🌳 to the theory of the multiverse. Lol, it just doesn't make absolute sense.
i love the long though explanations with pictures.
thanks!
Wish i had found this during Lock Down :(
keep up the good work
Thanks!
Jason Kendall
• 1 second ago
you can see the entire stack of videos here: www.jasonkendall.com/WPU/AstronomyLectures/fullcourse.shtml.
This will take you in the correct order.
A great explanation, Jason. Laird.
Thanks, Laird.
Another great video. Sincerely your biggest fan
Anything that needs to be covered in greater depth?
@@JasonKendallAstronomer For astronomy and cosmology, my personal preference is the stuff that is the most extreme in nature - neutron star varieties, black holes, quasars. I feel like you've done a great job covering facts that I hadn't heard before which is why I like this series (one thing that comes to mind is nuclear pasta, similar factoids). Your videos of the actual neutron star close-ups were gripping, I hadn't seen that before and it was amazing to see the videos evolve.
@@JasonKendallAstronomer One I might add to the suggestion box is a collection of astronomy and cosmology supercomputer simulation videos. You could go into detail on the physics behind some of the simulations, and the video doesn't have to be confined to a single "type" of simulation - more like a curated selection of ones that you find compelling as an astronomer. Spacerip has a video called "Hyper Earth" that had some amazing simulations. Also there are some black hole jet simulations floating around on youtube that were pretty hardcore looking. Lastly, one amazing animation (but not a simulation) that blew me away was from Brian Cox "Wonders of the Universe" series, and the video title was either "falling" or "gravity". Midway through, they have a neutron star animation that is 100x better than any I have ever seen.
LASTLY, I'd be quite interested in yearly or biyearly summaries of important discoveries for that time period. David Butler does a good job of this, but I'd also like to see what you could produce. You could even go back in time to fill in the great discoveries of the past 10 years. Its hard to find a good summary source from an astronomer's perspective that deals directly with what science has uncovered, outside of the pop culture stuff.
bit.tube/play?hash=QmbqXeYZGWd8v1ivLSSDxdxSDGUH3woFnrwcu5BC7fsMuT&channel=9328 - here we are, at the 32:50 mark
could you answe me how big the universe would be after 90 years?
I'm struggling with the meaning of certain variable and I'me really just curious of the answer
It sounds like there is an assumption that the "thing" before the Big Bang acted quantum mechanically?! Couldn't QM be emergent and not "required".
That’s a very big question. But your question begs “emergent from what?” A classical, non-QM underlying Big Numbers, Hidden Variable wibbly-wobbly, timey wimey Stuff? Hard to say. I would poke around on the history of QM studies and hidden variables. That might help resolve the idea. Remember that your question has likely been asked and addressed in a journal article level read.
Everyone accepts the expanding universe, extrapolated from the red shift, as the only explanation.
Yes. Pretty much it.
My favourite fetish.