The Universe is Hiding Something From Us | ESA Euclid
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- Опубликовано: 4 окт 2023
- The universe is expanding, but why? Dark Energy might be the key in solving this mystery.
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#astrum #physics #cosmology #darkenergy #darkmatter #einstein #quintessence
This kind of reminds me how we can’t directly observe an atom that makes up an object, but we can observe it by it’s shadow/silhouette.
cool yes
Really i just know it that we were observing atom as it was...thankz
At the scale of an Atom, aren't we just observing the point cloud of probable locations of the atom, rather than it's shadow?
Good comment, but for anyone interested, scientist is not observing the atoms shadow. In reality, we can observe atoms indirectly through various scientific techniques such as electron microscopy, X-ray diffraction, and spectroscopy. These methods allow scientists to gather information about the structure and behavior of atoms and molecules without directly "seeing" them in the way we see larger objects. There's no literal "shadow" or "silhouette" cast by individual atoms, as you might think of a shadow cast by a physical object in visible light.
@@horrypottur5854 Agreed. I interpret shadow to mean the discrepancy in prediction of Qmx vs Relativistic predictions.
The vastness of the universe is just mind boggling.
And we really know nothing about it.
Yes its in Bhrahmas belly right? 😂🤣
‘…in a grain of sand’
William Blake
@@69SoloJust as much as it’s in Jehovah’s back pocket or Shiva’s britches. 😉🙏🏼⚡️
About which we know horrifyingly little
I didnt know that you could see the patern of ripples of galaxies after The Big Bang. That is so amazing!
I’m glad this stuff isn’t easy and it’s become very difficult to figure out what the reality of the universe really is. It puts a damper on our egos and I think that’s a good thing.
always inspiring content good job mate :)
Very impressed with this video. I have always been interested in astronomy and physics. It was things like this that drove me to enter those professions. Thank you for feeding my insatiable curiosity about the universe and the wonders that we discove
Thank you Alex 🙏 and congrats for the Planet’s collection, they look amazing ✨❤️
Thank you, Alex 🤗 well done! I liked the info about the new ground based telescopes and the recent launch! ❤
Henrietta Swan Leavitt, one of the women working as data analysists at the Harvard College Observatory, discovered the period-luminosity relationship of Cepheid variable stars. Hubble just applied it outside of the galaxy to discover the expansion.
She couldn't do the observing herself because the hooker telescope at MWO was male-only.
Alex sounding like a Jedi master explaining the force there at the end. Lol You're doing great work man, you've got your style working well. Keep rockin bro!
It's incredible how something SO awsome is being done here in Brazil and I needed "some guy from Europe" to show me this here in Brazil.
Neptune was always my favorite as a kid for it’s never ending storms of shredding 1500 mph winds. Such a calm and serene planet harboring massive spots of chaos, which one can really only speculate as to what causes it. If a warm ocean does exist under that surface we could very well be looking past life in our own system.
Theres no evidence of life on Neptune which is mere speculation.........just kidding, because there is no evidence until there is. There is no evidence that life is NOT on Neptune ether so that means there might be life on Neptune as you suggest. what ever it would be it would probably be able to fly with all that wind.
Kmh!
Your dad's favourite when you were a kid was Uranus.
neptune doesn't have a surface tho
it's gas
watching this on Hubble's birthday! Love your videos Astrum!
Awesome video ! I love it so much . Thank you for sharing it with pleasure . How many habitable planets in our galaxy ? Happy week-end to you !
Okay, first, very nice job. I appreciate the effort. My mind is blown by the plan to map out the progress/evolution of dark energy. Peace.
If you need a lot of invisible stuff to stop your equations from falling apart, chances are that the equations have a lot of room for improvement.
That’s why it’s “dark”, meaning “unknown”. Dark energy sounds better than “mysterious pressure”. Dark matter sounds better than “gravity of indeterminable origin”
@@mikekolokowsky The point is not how those terms sound ("dark icecream" would sound even better!), but what purpose they serve. They'll likely go the way of "Aether" and the Dodo.
@@justNGC604 Like aether, the serious scientists that work with equations involving dark matter and dark energy know how shaky that house of cards is. They would drop those concepts if there was something better to explain the observable phenomenon. What IS making the universe expand, if not for dark energy? What DOES account for the unexplained gravity, if not for dark matter? If there was a mathematical explanation, there wouldn't be much dispute, because equations are hard to refute. If there was a different substance to point to, that substance would be what dark matter is. But without either a substance or an equation, scientists still talk about dark matter.
It's easy to make the comparison with luminiferous aether, isn't it?
@@mikekolokowsky, the answer to you in both cases is "no, it does not".
I am seeing "dark matter" and "dark energy" being treated as the goto answer for any unexplainable event in the universe. This sort of thing has precedent in stone-age level tribal societies.....in a "the gods must be angry" type explanation of natural phenomena, like volcanoes......
I'm so excited for the videos you will make along this telescopes journey ❤❤❤
I really like the more casual/natural approach to your narration in this one.
The flow is more easy to the ear. To mine at least.
Way easier to keep up while listening to you in the backround. For me, that is.
The effect could be compounded by the fact that English is not my native language. Dunno
keep it up!
We only know what 5% of the matter/energy in our universe is and people act like we know everything. That's something that annoys the heck out of me. Thank you for making this awesome video.
The fact that dark matter and energy make up the majority of the universe and we don't know what they are in no way implies we have little knowledge. There's just a lot of it. Both are supremely simple and uninteresting compared to normal matter and energy. Dark matter only interacts gravitationally and cannot form atoms or molecules. Dark energy is simply an expansive force that stays constant per volume of space so that as space grows, it grows. 95% of the universe might be dark matter or energy, but that's the boring part.
That's a mighty leap in a breath from "the maths proved it" to the erroneous titled Cosmological Constant, a fudge to "prove it".
The perfect video for my lunch break. Great timing
Beautifully explained. Thank you!
Awesome video as always say man.🌍
Thanks a lot Alex, you have one of the greatest youtube channels. I really enjoy your videos. Keep it up
Wonderful video! It got me thinking. . .the universe is expanding, and that expansion is accelerating, and space itself is actually expanding. . .and space is actually spacetime. . .what's going on with the time dimension? Is it expanding as well? What would that mean?
Excelent as always!
Wasn't the Big Bang slightly before 13.8 billion years ago and not "around 15 billion", or did I miss something?
And isn't it also wrong to call it an explosion?
yes, you missed it. you were born too late
You didnt. Astrum took some liberties. Also, according to some physicists and JWST the universe might actually be over 25 billion years old.
@@metal87power Dammit 😅😂
That was proven to be inaccurate interpretation of data for press coverage
@@henriqueacabralThere is no evidence it is any older than 14 billion years. That was some speculation based on that dodgy String Theory.
Saturn is my favourite planet. It's rings just have always been very mesmerizing for me!
Knowledge of any kind is always expandable. We as humans tend to focus on something in paticular and learn it's idiosyncrasies inside and out...Only to find we opened up a thousand new questions for the one we answered. Having to know what, why, how, and when is something humans always will strive for while we exist, only to discover knowledge is an infinity of new questions always expanding just when we think weve figured it all out.
7:50 virtual atoms popping into existence is a little bit much
In a quantum field they just represent peaks of matter coalescing before reconforming to the whole. Self annihilation is two peaks colliding and cancelling eachothers force out.
VPs are pretty cool. You should look em up!
My heartiest thanks to the entire team of Astrum. ❤ Thank you for the best.
Isn't Astrum just Alex ?
@@SBImNotWritingMyNameHere i think his brother also works on it but not sure
Yes. But there's always a team involved
@@12345Kainan ah yes by team you mean
Your mother
(Had to, there's a gun pointed at my head)
Its amazing how vastly empty the universe is, yet it holds everything we will ever know and sense.
Psst kid
C'mere psst yea
Ya heard of the single election hypothesis?
Empty from our point of view. An atom and thus solid matter is also mostly empty space 💟
@@eSKAone- exactly what I want to write... that atoms are also mostly empty... and so all materials look dense for us, but that's just on our scale/sense. There is a superb video about it from Veritasium.
When you think you're being deep, but just stating the obvious.
Empty? No way there's quite a lot of stuff!
This one was a bit less, umm, strict than your standard, Alex.
BTW, it would be amusing to note, about 5:05, that "Big Bang" was a disparaging moniker for this theory invented by Sir Fred Hoyle, a proponent of "steady state Universe" hypothesis, where the Universe does expand (he could not dismiss observations by Hubble and others), but the matter gets constantly created. It was only the discovery of cosmic microwave background that finally buried steady state hypothesis.
Somebody needs to make a documentary about Sir Fred. He had an amazing life and was a really terrific writer. Although his steady state theory was disproven I still loved reading his books. Somewhere I still have a copy of his book _The Nature of the Universe_ . He also was a founder of another controversial theory, panspermia. And he also wrote science fiction.
@@bbartky Yeah, "Black Cloud" and "A is for Andromeda" (IIRC the titles) - not halfway bad, especially the former.
There was no big bang. Just galaxies free falling through space in very little matter. Once galaxies start hitting the boundary, they will all start bouncing the other way. The boundary is dimension itself. When two boundaries come in contact with each other, galaxies pierce through the boundary and travel to next dimension. This cycle repeats endlessly.
This is a fantastic video!
Except, I was distracted by the fact your voice sounds exactly like the one from the "Moon Men" song in Rick & Morty.
You can hear it in the first 30 seconds in words like "cosmos, fabric and explosion"
Black holes, when consuming/absorbing a certain amount of matter, energy, time etc, will form or morph into universes
I’m probably over simplifying it, but I always envision the universe we occupy as a Tori that folds back in onto itself.
As soon as I started getting into cosmology, I read a lot of papers and this seemed to be the obvious answer. I was interested in the shape and the torus stuck out like a sore thumb. It's a 3d reflection of a 4th dimensional spacial dimension that goes through us.
Remember when Astrum videos had chill music in them? I miss that.
Nah 🙂
It still has.
Now, I'm sure there's some easy explanation as to why this idea has been dismissed, but...
The more distant galaxies have greater doppler effect meaning they are moving away quicker, but we are also seeing their light from billions of years ago, so are we not observing how fast they were moving then? Maybe in reality they've slowed down now.
The space between us stretched. The galaxies aren't moving. Like dots drawn an inflating balloon. They get further away, but none of the dots are moving.
@@filonin2 Surely the dots on an inflating balloon do 'move' away from each other.
Anyway that's pretty much semantics if anything, it has nothing to do with my question.
In the science fiction canon I'm constructing, the "universe" the characters experience is the interior of a singularity itself living in an outer universe. ("Turtles all the way down.") Dark energy within that universe being the result of matter falling into the outer singularity that is the universe. It creates an imbalance, a literal inflation of the inner pocket universe. The problem remains: you can't measure the whole of a system from within that system, so it'd be essentially impossible to identify, accurately, that you're inside a singularity unless you can… escape it.
The "gods" of my universe are, generally, scientific researchers; outsiders who project themselves into the pocket universe from outside. Time/space space/time inversion gives… strange powers to these individuals. The ability to manipulate the information on the surface of the singularity provides… "magical" powers that are indistinguishable from sufficiently advanced science.
Under that model, causality is reversed at that level. The expansion occurs before information merges with the singularity. It is similar in concept to a virtual hard drive on a virtual machine needing to expand the size of a virtual hard drive before information can be written to it. You could also postulate that the singularity is 0 Dimensional in the higher universe, meaning that a particle merging with it has a possibility of emerging in the child universe everywhere until it is observed (measured) which is an alternate explanation of quantum foam.
What you just explained is actually the reality. That’s what happened. Has. And is.
So , we're inside a black hole and the cosmic microwave background is the accretion disk? Idk
A simplistic comment. If we observe galaxies 10 billion light years from our pov, that means those far away galaxies are expanding at the velocity they had 10 billion years ago, while we have slowed down in the meantime. Wouldn’t the observed acceleration be consistent with that? Could you explain?
Hubble didn't 'suddenly' have a ruler, the cephid variable stars were discovered by Henrietta Swan Leavitt. Maybe consider mentioning that his discovery was reliant on hers... He didn't do it on his own.
8:30
So you are telling me that if Bob has 3 apples and a friend gives him 2 apples, he doesnt have 500000000000... (120 zeros) apples?
Newbie question. If space is expanding and galaxies are getting further apart from each
other, why is then Andromeda galaxy getting closer to our galaxy?
That image captures earth's ore inspiring beauty
I love that we end up, needing a cosmological constant, just not the value Einstein gave it to make things not move. I think that’s the part everybody forgets about. I love it :)
Understanding the universe requires a universe sized mind.
but what about smaller stuff like us? Are we expanding? how fast? is there a way for us to tell/notice that we ourselves are expanding? or is it only the space between matter? and what does "between matter" even mean? go small enough and anything looks like empty space.
About BINGO telescope, it's a project from USP (São Paulo State university located in São Paulo city), but the telescope is being built in the country of the State of Paraiba, northeast region of Brazil.
this is a nice story
Did you looked the direction of galaxies ? Maybe it helps to find the center.( the place where big bang ( or big spinning) happened.
The big bang wasn't an explosion. It just started expanding rapidly. I know it seems like nitpicking, but the difference is important. There was no fuel that combusted to produce energy. We don't understand how that all started, but it was not an explosion.
It was less of a “Big Bang” and more of an “everywhere stretch”
It's not necessary that anything happened prior to the big bang
Or rather, it's better to think this way, time may not have existed at all prior to the big bang, if time even exists at all
They think two realities touched
Yes let’s say what we know to make sense to make sense of the things we hardly understand. Enough “pressure” can cause an explosion without a match in Star Wars editing
explosion (noun, countable and uncountable, plural explosions)
1. A violent release of energy (sometimes mechanical, nuclear, or chemical)
2. A bursting due to pressure.
3. The sound of an explosion.
4. A sudden uncontrolled increase.
5. A sudden outburst.
Something can explode without fuel. Popcorn explodes (and expands!) due to the pressure becoming too high for the kernel to hold together.
Kind of missing the role of Georges Lemaître in the story here? He was the original person to propose the expanding universe and the big bang
8:39
I cracked up laughing at this. Something about a guy with his masters and PhD, calling a prediction “the worst in the history of physics.” Gives me a good chuckle.
Prediction: Euclid will fail just like every other dark matter/energy investigation and hypothesis has failed.
Alex, please help me understand something. Surely if there was 'something' (dark matter) in the medium of space itself that was slowing the light down as it moved through it, this would have the same perceived effect of further galaxies moving away faster. As there would be more of it in greater stretches of space. This theory is supported by gravitational waves... how could a gravitational wave, stretch nothing... surely there is substance to space and it is directly related to both these effects and counters the expanding universe theory!
As a total novice at physics I have a question.
Could these virtual particles have mass, and if so, could this be a solution to the dark matter enigma?
They do have mass at the point of creation and annihilation, which is almost the exact same time. It can exert a push, but as stated in the video, if VPs were responsible, the universe would be sprinting away from itself.
You forgot about Lemaitre!!! He is the one who corrected Einstein, and Hubble only later provided the physical proof.
0:25 I truly hate these kinds of big bang animations where perfectly ready made galaxies come flying out in all directions
If expansion is constant, a point twice as far away will move twice as fast as one at half the distance. Don't need accelerator to explain that.
1:13 That is because the universe is "Deflating" lead by matter at a faster rate than space time.
Many scientist will not forget the theory of big-bang. The future will teach us about biggest mistake. It's human to make mistakes.
Very interesting topic, nice video, Alex, good job!
The Hubble constant or expansion is not caused by an initial explosion! I think the Big Bang theory is now outdated in this respect - of course not other parts of the theory with the different stages of the universe, there it is a valid and well explained reality...
Our universe is simply still growing, just as all things in nature grow to a certain point. And this growth means expansion and more matter for our cosmos...
Until this expansion eventually stops and the universe finally enters in a late existence cycle. When the electromagnetic pulses become even weaker or stop, the universe comes to its final retrograde phase, something like a big freeze or collapse...
And then it starts all over again, with a mini-universe forming in a new plasma and adopting the physical laws and material processes of the previous universe, perfecting itself in the process, as it happens always with the evolution and constant renewal...
Natural laws at their highest level, so to speak!
Creators of the 'Big Bang Theory' never speculated that there was an 'explosion'.
You could start by changing your understanding of the "Big Bang" from an explosion to something more accurate. More like a sudden change in the energy state of the universe, causing discrete packets of energy to quickly move away from each other.
Um. Like in an explosion, right?
@@Beatsy Boom!
Isn't the increased velocity of distant objects due to the space itself expanding and not due to the dark energy? If I recall correctly the dark energy would be responsible for the rate of the expansion increasing over time not distance.
I am far from a scientist but in the beginning of this video I hear something I think sound strange.
The beginning is described as an "explosion" and not an expansion, then it do a size compare with a pea, but that is nothing we can know and it just look like that from our perspective, so it shall be described as a "more dense and hot sate than can be observed now".
If I am wrong (high probability) please explain where and give better reasoning/explanation.
The hypothesis of dark energy is based on the observation of the recession velocity of distant galaxies. The observed recession velocity of any galaxy is made up of two components 1) The expansion of space 2) The movement of the galaxy through space due to gravitational acceleration.
The explanation for the anomalous recession velocity is due to a gravitational field caused by all the galaxies acting on the distant galaxies.
So the expansion of the universe is not accelerating and dark energy doesn’t exist.
Richard
It's called "photons". Not "dark photons" or "virtual photons" or "axions", just simple, run-of-the-mill photons, but only if we accept that photons have mass. Unfortunately, that means reinterpreting a hundred years of data. That is why physicists are reluctant to consider the idea even though it has never been even lightly challenged. It was simply that the idea of massless photons were chosen arbitrarily without any discussion. Physicists were just afraid to voice opposition to the general consensus. (That happens more often than it should.)
Maybe the fact that galaxies appear to be accelerating away from each other is an illusion. Something having to do with the shape of space that we can't understand yet.
"Einstein so disliked it" Where does that information come from? In science, when there is no data, it is proper to assume the Null Hypothesis. Then when the data supported it, he changed updated the equations. It's not about like/dislike.
The way that "time dilation " works we're supposed to see the outer stars of the galaxy move slower than we see, or to be technical in Proper time the outer stars are actually orbiting a little faster than we see and the inner stars are orbiting alot faster than what we see due to the inverse square law and gravity. A similar effect causes redshift therefore having no need for "dark energy"
I'm sure you know more about it than physicists
@@xb5442 do physicist say there's no time dilation effect or is it that you just have no idea what your talking about?
There might be multiple universes
yup this is my thinking , if one big bang happened within what they think is a infinite scale of blackness why not it also happening again or more likely a infinite number of times in other parts of the blackness ... they say the universe keeps expanding and will do so indefinitely so why not think that what we see as our universe started within another universes expansion , but we can't and never will be able to detect it because the scale and physics of it all is just out of our understanding
i need an addon that adds a "just another video about dark matter/energy" warning
Great videos always .. I have some questions & assumptions:
1) why do we need to assume that the expansion is caused by dark energy when we assume that the Big Bang & inflation released exponential energy some 14 billion years ago, which is a short period of time, if we assume that the universe will continue for trillions of years .. isn’t the big back energy enough to continue to accelerate the universe from its singularity zero velocity .. of course u may say that the the gravity should reduce this acceleration but it may very well be that the universe expanded exponentially for the gravity to be effective at these farther & farther galaxies?!
2) it seems the total energy of the universe zero which means that matter & antimatter cancel out, positive energy & negative energy cancels out, gravity & antigravity cancels out etc. Therefore why can’t we assume that antigravity is expanding the universe if we can detect gravitational waves throughout the universe .. can’t we assume that antigravitational waves also could be expanding the universe?
3) Assuming that infinite bud universes were created after inflation & they formed an exterior bubbles cluster around our bubble universe .. don’t that create outward pull on our bubble universe??
I would appreciate your thoughts .. Thanks ..
Black holes get fat. And stretch out the 'skin' of the universe. I imagine as more of them are made when stars die out, it will get fatter for a long time. But they'll lose weight eventually and the universe will be all lose and floppy. Then it will start again and the matter will settle into the loose skin. Gravity wells that clumps galaxies together.
Basically, the fabric of the universe is Christian Bale preparing for a role where he gets real skinny, then fat and buff. Each role is a new universe.
The best route to take is to think about what happens when a black hole is formed. I imagine that all the matter that will ever fall into the black hole will seemingly arrive at once from their perspective due to the theory of relativity (ie, the big bang). Now if the rate of expansion of the event horizon, or the volume that contains the matter inside the black hole has a descrepancy in the rate of expansion in comparison to the matter inside, however small the discrepancy, due to the wrapped sense of time experienced by the matter inside, the difference might be enhanced.
What I'm saying is matter exploded faster than it's container, now the container is slowly exploding relative to its content.
It's just a thought 🤔
It's just matter crushed in very closely..... which is why it can grow
I'm very glad you wrote that last sentence. It literally did help me to understand your first paragraph. 😊
excellent. the problem is that every black hole gets smaller each time, right? it eats less than its' universe. given anthropocentric probability it would explain what we have now, but over larger time, meh
Something so big, you can't see it? Just knowing you are a part of it all is enough for me.
If wavelengths are changing over time and distance how can there possibly be an accurate measurement of acceleration? Seems to be a lot of supposition and fitting the curve. My gut feeling is Einstein knew something.
Do you mean the doppler effect? If so that does not describe change over distance travelled or time. It describes the shift in frequency of a wave, depending on the observers and emitters relative speed.
Einstein actually deserves LESS credit than he is given. There's a reason he stopped doing lectures.
It wasnt an explosion, it was an extremely rapid expansion. Two different things :(
If all the galaxies are moving away from each other, how do some of them merge together? Is there a specific distance between them that overcomes this expansion and they start to get gravitationally influenced by each other?
I'd say yes. 🙂
On the scale of the universe galaxies are moving away from each other however on a local scale gravity pulls some galaxies together such as the Milky Way and Andromeda galaxies. In fact both of these galaxies are part of a larger gravitational system focused on “the great attractor”.
It's called self organization. Like how the wind makes leaves collect in piles and trash collect against your fence. On a large scale, randomness clumps together but the clumps are even.
I cant help wonder if the univers is expanding out or retracting back in. What we see and think is actual expansion, might be contraction going back to where it all began to start all over again.
So what will happen first. Everything getting too far away to see? Or the heat death of the universe?
1. Matter and its gravity are not really understood.
2. Dark matter and its gravity is not really understood.
3. Dark energy and its gravity is not really understood.
I like it. :)
If everything we see is flying apart, then by measuring the relative increases in distance between galaxies we should be able to get an idea of the directions they are going and work backwards to a rough guess of where the big bang happened, relative to our current position. Has this been done?
That would only work if the 'space' of the universe was already there and the big bang was an explosion of matter at some discreet point in that space. In reality the big bang would have happened everywhere, because it created everywhere.
The great attractor is a good place to start looking. It's the closest phenomenon of that nature.
The universe is full of humor. Some of the funniest things in the universe are primitive half-apes who think they understand it and its origins
Exploded from what? There had to be something there to explode.
Not necessarily in quantum mechanics. Virtual particle pairs are commonly created in the vacuum of deep space. There is nothing there. If you understand that process, then understanding how the Big Bang (theory) gets the universe from nothing is more understandable.
*ALL* the galaxies are moving away from us? What about Andromeda?
Is there any theory that postulates the observable universe is really just a bubble of space where a new lower value vacuum energy nucleated and began expanding at the speed of light, and itself may be a false or meta-stable vacuum energy?? Could such a bubble actually be the Higgs field expanding???
One take-away from space research to hold on to: Always Think Bigger!
And then know that you've seen nothing, yet.
“Long ago the entire universe was a microscopic dot in nothing, then exploded into everything.” What a colossally ridiculous theory to explain the existence of the universe.
If everything is being pushed apart, how come our galaxy is going to collide with Andromeda? Secondly if everything is accelerating away it will reach the speed of light and transformed in energy? Thanks for your explanations on all subjects in space and time.
When fall comes, leaves fall away from the tree. But some leaves clump together nearby. Things on a very large scale look evenly distributed. But randomness has repetition and groups. Gambling streaks are a food example.
I dont understand how the laws of conservation of matter/energy which talk about how matter and energy can't be created or destroyed but then I watch explanations of dark energy go on about how space itself contains a repulsive energy and as space spreads out, it sounds like there is an increasing creation of dark energy that is expanding space itself. So where does all this new repulsive dark energy come from if energy cannot be created nor destroyed?
pedant here:
most of you will know this already, but for those who are new to Astrum...
there is one galaxy that we know is *not* moving away from us.
Andromeda, a member (the largest) of our local group.
the Milky Way and Andromeda will collide in 2-3 billion years.
(we won't be here for that spectacle, though)
It’s kinda like the cosmic game of hide and seek; matter is hiding and anti matter is finding
Not all the galaxies are moving away from us, Andromeda is said to be on a collision course. Also, there are multiple gallaxies that are considered the result of similar collisions.
Very few galaxies (about 100) are moving towards us and they are all very close by and gravitationally interacting. Everything beyond about 300 million light years away from us has a redshift (moving away from us), but I'm not sure how distant the least blueshifted galaxy is.
The missing content in the universe is just blocked until the universe releases a battle pass for players to subscribe to.
Imagine an explosion so big, it takes eons for it to exhaust its energy. It would likely produce vortices eddies during this release of energy. These vortices exist in the realm of quantum physics and we call them subatomic particles. Some of these particles are stable (standing waves) and some pop in and out of existence. Space is not a vacuum. James Clerk Maxwell understood this when he came up with his equations that are used by engineers to this day... To understand everything you have to see what we cannot see because of scale and more specifically time scale... We have a hard time seeing REALLY BIG THINGS and equally REALLY SMALL THINGS. We need to study the turbulence of highly energetic events like explosions to get a clearer picture of the mechanics of our universe.
reactions that occur in an attosecond, sufficiently scaled up dimensionally could take an eternity to unfold. Our universe could be a brief flash to higher dimensional beings...
Do you think expansion will prevent the collision between Andromeda and the Milky Way?
It seems that the space between galaxies expands but not the galaxies themselves, and indeed matter on all scales smaller. Hence the presence of conventional mass suppresses the expansion.
at some point it is predicted even the galaxies and planets will expand outward
I had never heard an allegedly scientific source refer to the big bang as an explosion until now. Huh.
Time to re-evaluate this resource.
It's a useful idiom.
Man, Sagan himself used that.
It does make some sense that the universe would expand faster.. if we consider the effect of gravity diminishing on all objects over time may then the matter at the edge of the universe may hold the key to understanding how we define existence.
The assumption is that matter at the edge of our observable universe behaves no differently to the matter where we are.