The Mystery of Our Expanding Universe
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- Опубликовано: 13 июн 2024
- The farthest known galaxy is GN-z11, which currently resides at a distance of 32 billion light years from Earth. But wait, how could there be a galaxy "older" than the existence of our cosmos? In this video, we'll explore the mystery of this topic.
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Table of content:
0:00 Opening
0:54 The clues from the past
3:05 Why we are expanding
6:31 The idea of the universe without end
9:26 The inevitable fate of the universe
Script:
The expansion of the early universe is adequately explained by the Big Bang theory. That the explosion started it all, from a single point of singularity until everything that now exists. Because of this Big Bang, it is thought that the expansion of the universe will eventually slow down, owing to the "attracting" aspect of gravity. Namely, the gravitational attractions from the stars and galaxies.
So until recently, all evidence supported this accelerated expansion without any exceptions. Observations such as the CMBR and the redshift of galaxies supported this theory.
However, in 1998, two research groups from the Berkeley Lab and the Supernova Cosmology Project found something strange. As expansion can't be observed directly, they look for other effects caused by expansion and deduce the expansion speed based on these observations. By using reliable data from all over the skies, both teams independently discovered that distant supernovae seem to be dimmer than expected. The researchers claimed that when they look at these objects, they look further into the past, to about 7-9 billion years ago.
This finding shattered the previous theories of slowed-down expansion. Which would mean that the universe expansion is accelerating instead of slowing down. And just recently in May 2018, a research team from The Dark Energy Survey has released the largest map so far. Their findings continue to support this expansion rate change, with a pretty surprising twist-these changes are accelerating over time. Yes, it was all happening regardless of the effect of gravity we talked about before.
To answer why the universe is expanding, it's critical to first understand what caused the expansion. The scientific consensus so far is due to the mysterious #Dark #energy that permeates nearly all of space. Of course, the term "Dark" doesn't really imply that it's dark at all. It's just called dark energy because nobody knows what it is or where it comes from. We can't even see it directly since light can't travel through such a dense and pervasive field, unlike normal matter. It just doesn't behave as anything physicists know about.
Also, the name implies this as energy, like gravity or radiation. But in reality, there isn't any physical evidence for this. When you really dig deep into the theories, there is no way how Dark Energy can interact with matter or radiation. It just operates in a completely different manner. That's why some researchers are calling it "Phantom Energy".
The expansion of Dark Energy is constant, but mainly not uniform in nature. There are regions where expansion happens much faster than others. Take for example a constellation named Hydra. In the relatively far future, due to a faster rate of expansion there, all galaxies in the Hydra constellation will be outside our cosmic horizon. It's not that all of it will be gone immediately, but it's going to be pushed away from our view, beyond our visible universe. All information they contain about their existence will be lost forever.
Imagine if this were to happen today on nearby objects from our planet, say the planets on our solar system. If they began to move away from us faster than the universe's current rate of expansion, eventually all information about the solar system would disappear beyond the horizon. Our future grandchildren wouldn't know that there were something called Jupiter and Saturn. This may be the most disheartening thing you hear today.
When expansion seems to be much higher than expected for a given gravity and density of the object, we call this effect "Gravity Enhancement". The phenomenon was first discovered by Nobel laureate Saul Perlmutter, astrophysicist Adam Riess and the Supernova Cosmology Project. They found out that expansion was much faster than it should be if Dark Energy expansion is constant everywhere.
One popular speculation is that expansion happens due to a mechanism called "Vacuum Metastability". It is an idea that expansion might be due to the universe being in a "quantum fluctuation from nothing". Or in other words, an expansion might simply be a result of our universe spontaneously popping out from nothingness. After all, perhaps expansion is an inherent result of expansion itself. The rate grows exponentially due to a feedback loop that feeds on dark energy tension. 
Кино
Fun quiz: How many times the word “expansion” is (verbally) mentioned in this video?
Our team will pick two people with the correct answer and give them each a merch from our nerdy collection
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51🤔
49!
48
52
56!
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But what was there before the big bang, what's there before it's expanded too
🤯
Research about Quantum Fluctuations
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Somewhere between the tugging of two Great Invincible Evils, I find Life hanging in the delicately perfect balance
Allah Subhanahu Wa Ta'ala said:
وَالسَّمَآءَ بَنَيْنٰهَا بِأَيْٮدٍ وَإِنَّا لَمُوسِعُونَ
"And the heaven We constructed with strength, and indeed, We are [its] expander."
(QS. Adh-Dhaariyat: Verse 47)
Mashallah 💖
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I've heard the different theories, The big rip, the big crunch and the big bounce. Here's a 4th theory our position is actually falling into a black hole. This would create the illusion of an expanding universe. The spegattification of things falling into a black hole would only happen relative to an observer outside of a black hole, from within the black hole the spegattification would not be observable.
Keep goin bruh💪🏻. You're doing awesome and we're glad we subscribed your channel. Love from India 🇮🇳❤️
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With regards to editing and hype-factor: Less is more. Personally I like more of a pure-facts approach rather than dramatization, and I really like your older videos.
Great feedback, thanks so much 🙏
If the universe is expanding then, everyday we must be losing stars and galaxies from our view in the observable universe. And if is expanding at one direction it must also contract at another direction.
The accelerating expansion of the universe should be because of the fact that the radiation pressure force of stars is actually 80 times larger than the total gravitational force of stars, according to a published article by Xinghong Wang.
If you collaboration with David Kipping it will be interesting..
Expansion is infinite ✨ 😍
I like your informative 👍
Yes! Thank you!
The only thing I can think is, with space being so large that we can barely even leave our solar system, there's no way we're not alone. But on the other hand, if we are all alone, that begs the question is it just by chance that we happen to be the only habitable planet or was it purposeful by some entity or maybe something godlike. Or maybe if it was intentional by some being for us to be the only living planet, wouldn't that kind of mean that we're basically an experiment of some sort? Maybe just a creation to see what we can do? And if so, where does this being come from? Did something create it? The questions are infinitely infinite.
I am Here before 1 Million Subs
Dr. Bee... have not read my Time Matters - where redshift just explained as 32B years ago time was 12 times slower. Slowness of time in the past equals redshift today - because wavelength is in a time interval that is not constant.
Like someone said our current generation is unlucky we are born too late to explore the world and born too soon to explore the universe, sadly we will all die without finding out our own existence.
Wow
matter is only an assumed state of being only consciousness exists assuming shapes & names and dissolving bodies into itself.
plz study Nasadiya sukta of Rig Veda - oldest text on earth. Upanishadsays-the one and only one wished to be many & heated up and exploded.
How many times has the Universe expanded by a big bang event only to collapse back upon itself and start life over again and again? who is going to answer this question? This is a fact that can't be denied, "E=m/c" "For every action there is a reaction and life will begin over and over again. The Great Creator works in mysterious way. What happens to the "Lines of Force" in magnetism?
Expansion terhenti maka antar galaxy akan saling bertabrakan..
But you didnt answer how can we see something from 32 billion light years away, if the universe is 13.75 billion light years old.
How would expansion looks like for 5th dimension beings and higher
In an infinite Universe, size is irrelevant. Our Universe is expanding, and to us, seems vast. In fact we are incredibly small. Could it be, that just like a balloon, or a bubble, rather than just keep expanding, or potentially begin to start getting smaller (the big crunch i think people call it), it could just pop, and throw everything, everywhere, into instantaneous chaos.
Just a thought. Perhaps our universe was created when a prior universe collapsed into a giant black hole, as you mentioned our universe could do, and a white hole created our universe.
How will gravity and expansion create universes???I do not get it. Btw G R E A T video
The speed of gravity = c (LIGO)
The speed of the electric field = c (speed of electricity)
So c is the speed of fields, not the speed of light.
So why is the speed of light = c? Because light travels through the Luminiferous Aether which is a magnet medium so the speed of light is actually the speed of the Magnetic field.
Aether is pushing the galaxies apart. Aether explains cosmological red shift without violating conservation of energy.
You be the judge!
My doubt why everything in this universe is either spherical or circular 🤯🤯🤯🤯🤔🤔🤔🤔 like galaxies, planets,stars etcccc
I think naturally bigger objects are circular because of gravity. and not all galaxies are spiral btw
As far as equations and laws of present cosmology is concerned, universe appears to be flat, and there is no anomaly right now, though it could be possible that the universe which is under consideration is just an infinitely small point of the big picture.
Cuz gravity pulls matter uniformly from all directions towards a centre
Bro a thought just came in my mind, if a telescope can see like lets say 400 million light years far away in a period of less than 2 to 3 years, does that mean telescopic speed>>speed of light? Just sayin'.
I wanted to say 40 million light years.
I think the universe is expanding because black holes are ejecting energy into space I think black holes are white holes as well sucking in mass on 1 end and ejecting it out the other
Since energy has no mass and moves at C2 it can theoretically move backwards thru a black hole
Further there is no such thing as infinite energy so a massive black hole is inevitable, however I theorize that when all mass has been absorbed the sum of the universe will finally actually be calculated as 0 and the black hole will collapse, with all energy in a infinitesimal space another big bang will occur,
Further since energy is so fast it is omnipresent it can move backwards thru time, meaning that big bang will be the original big bang
If the universe is finite but expanding, what is it expanding in to...?
If the universe is infinite AND expanding, what is it expanding in to...?
Shared this video in my what's app
Varily in the heavens and the earth are signs for those who believe... Qur aan 45 :3
The big bang theory😂
1400 years ago, Quran did mention that the universe is expanding.
"The heavens, We have built them with power. And verily, We are expanding it" Surah Adh-Dhariyat - 51:47 .
The heaven we have built them with power and varily we are expanding it.. QURAN 51: 47
And in ur own creation and in the animals whome Allah (God) is scattering (all over the earth) there are signs for those who affirm faith.. 45:4 And the sun: its moving to its place of rest: this is the decree of the Almighty all knowing Allah 36:38 And the moon : we have determined stages for it till it again becomes like an old dry palm branch 36:39....... Neither is it possible for the sun to over take the moon nor for the night to outstrip the day each(just) swims along in(it's own) orbit 36:40
Job 26: 7 He STRETCHES out the northern sky over EMPTY SPACE, Suspending the earth upon NOTHING;
Written over 3500 years ago and STILL remains true today. Just HOW was Moses able to possess such knowledge without proof CENTURIES before we knew these two facts to be true?
Big bang and universe expansion in Quran,
أَوَلَمۡ يَرَ ٱلَّذِينَ كَفَرُوٓاْ أَنَّ ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضَ كَانَتَا رَتۡقٗا فَفَتَقۡنَٰهُمَاۖ وَجَعَلۡنَا مِنَ ٱلۡمَآءِ كُلَّ شَيۡءٍ حَيٍّۚ أَفَلَا يُؤۡمِنُونَ
(Sahih International)
Have those who disbelieved not considered that the heavens and the earth were a joined entity, and We separated them and made from water every living thing? Then will they not believe?
-Sura Al-Anbya, chapter 21, verse 30
وَٱلسَّمَآءَ بَنَيۡنَٰهَا بِأَيۡيْدٖ وَإِنَّا لَمُوسِعُونَ
(Sahih International)
And the heaven We constructed with strength, and indeed, We are [its] expander.
Sura Adh-Dhariyat, chapter 51, verse 47
Thanks
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There is no God but He, It is who gives life and death He is ur Lord and Lord of ur ancestors who have gone before.... Qur, aan 44:8 Every soul will taste death.... Qur, aan 29:57
Did you know... Quran 51:47
We built the universe with ˹great˺ might, and We are certainly expanding ˹it˺
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It's not nothingness It's Almighty Allah who is the creator...
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I love ur content but u are underrated 😢.
So pathetic bro...
Keep goin bruh💪🏻. You're doing awesome and we're glad we subscribed your channel. Love from India 🇮🇳❤️