How Do We Know Universe Is Expandingw/ Brian Cox #briancox #universe

Prob wrong though.

Is redshift quantized?

Can it not be gravity pulling on the light instead?

we can just not do it our selfs. We almost can see differences in the light . They however can see this so good that they can detect molecules on exoplanets. Molecules that you can almost see with a microscoop .
Or it is just BS ...

This proves only the matter in the universe is moving, not that the whole "space" or "room" where the matter is situated is expanding.

The man who is paid millions to make sure the hapless public believes the universe was created even though every law in physics states it's impossible.

The Big Bang was merely our universe turning itself into a gargantuan particle collider that created quark-electron plasma shrapnel as the expanding galaxies.

It is stupid to believe the universe was created.

And the heaven We constructed with strength, and indeed, We are [its] expander.

QUR'AN 51: 47

Truly an answer based on assumption. !!!!!!

There is nothing scientific and provable about this.

There is nothing scientific and provable about this.

You can almost think that this guy is full of BS

You can almost think that this guy is full of BS

What you find is you see light coming into your telescope and you make a decision about what you think it is and then you tell all the people that’s that what it is and that’s it

What you find is you see light coming into your telescope and you make a decision about what you think it is and then you tell all the people that’s that what it is and that’s it

I’m not a scientist, but I can tell you that if you concentrate on your own thoughts and common sense that you might not agree with what the powers that be are telling you

I’m not a scientist, but I can tell you that if you concentrate on your own thoughts and common sense that you might not agree with what the powers that be are telling you

Proof please!

You can almost do it. 1st clue that this guy is a hoax.

Imagine denying a creator when His evidence is all around us

That was a whole lot of talking just to say a whole lot of nothing... all he explained was that the further away the light source its going to be more red... absolutely nonsense in regards to the question.

The universe is not expanding.

I mean couldnt it just be that light loses energy as it travels?

How do you know an siren is moving away from you? Same concept both are shifting wave lengths, but now its red shifted light.

The comments here made me wonder whether the redshift / Doppler effect could just mean that galaxies are flying apart through already-existing, infinite space versus indicative of an expanding universe. I put the question into ChatGPT (which is basing its response on the info it’s collected from different sources) and here’s the response. If there are any incorrect pieces of information from it, it would be good to know by providing links to science articles that provide the correction.

Excellent question—and it strikes at the heart of what makes the concept of expanding space so unintuitive.

You're absolutely right to ask: couldn't
Here’s why scientists conclude that space itself is expanding, not just that galaxies are moving through it:

The Redshift Pattern Is Uniform in All Directions
* If galaxies were simply moving through space like debris from an explosion, we’d expect to see some asymmetry—a preferred direction or center of expansion.
* But Hubble’s Law holds true in every direction, with no center: every galaxy sees every other galaxy receding, proportional to distance.
* This is exactly what you’d expect if space itself is stretching, and not just galaxies moving through it.

General Relativity Predicts Expanding Space
* Einstein’s theory of general relativity doesn’t treat space as a static backdrop—it allows space to curve, stretch, and evolve over time.
* Solutions to Einstein’s equations (e.g., the Friedmann-Lemaître-Robertson-Walker metric) predict an expanding or contracting universe depending on energy density.
* These models naturally explain redshift as the wavelengths of light being stretched by the expansion of space—not by motion through space.

Cosmic Microwave Background (CMB) Evidence
* The CMB shows that the early universe was hot, dense, and uniform.
* As the universe expanded, that dense state cooled and thinned, leaving behind the low-energy microwave background.
* This cooling and redshifting of photons is what you'd expect if the fabric of space itself expanded, not if objects just moved away in static space.

No Observable Center
* In a normal explosion in static space, you'd be able to identify the explosion’s center.
* But in the expanding universe, every point in space sees the same expansion. There is no privileged center.
* This symmetry suggests it's space that’s growing, not just motion through space.

Sorry, but we can't observe the expansion of the universe directly because the Zone of Avoidance (ZOA) obscures more than 70% of it from our view.

Maybe we live inside of black hole, which is constantly drawing galaxies inside, which gives the illusion that were expanding

Dark matter & dark energy is just a booty call to BB enthusiasts.

I totally understand red shift, but I always imagine a person with a telescope observing us back from the galaxy we are viewing; surely we would appear as red shifted also!
I always wonder just "who" is moving away from who!
What I mean is how do I know which galaxy is closer to the big bang? Because anyone on a distant galaxy observing us, would have the same perspective as we do observing them!
Who's moving away from who, and in what direction?????!!!🤯

Well we dont know that for sure. Or rather we dont know why it appears that way for us in particular. But we definitely dont know that it happens the same way everywhere. LCDM is the next string theory.

The Universe don't expand, It is only the stars and galaxies that go further. The sky don't expand because I throw a ball in the air!!!

What other reasons would they do that?

What if light just does that from large distance traveled?

Red shift.

but what if there is a red galaxy thats close??

Jesus is the Lord!
Isaiah 40:22- Jesus is The WORD of God made flesh John 1:14- Jesus knew the Earth is round long before anyone else...! Jesus knew the universe is expanding long before anyone else He's stretching out the heavens to make room for when spiritual realm become one with the physical realm...!

yep, ive seen it. Behind NGC 300 are 3 galaxy clusters with one being 2 billion light years away and you can see that they are all yellow/orange

We built the universe with ˹great˺ might, and We are certainly expanding ˹it˺. [Holy Quran 47;57]

That explanation might be simplified but it’s effectively bunk.

They are more red because they are closer but still moving away and bluer but farther away…

Luminosity definitely drops in an inverse square manner by distance away but the Doppler effect of light when both sources are alleged to be moving away emitting photons causing those shifts is not the correct interpretation even if simplified.

Advanced amateur?

2 trillion galaxies and this guy pursing his lips thinks he knows something with certainty, sure 🤦‍♂️

The great fun would be to check every single one, and see if you get variation...that will be real funky stuff.

Yeah i thonk there are lots of other possible explanations.

borrrrrriiiiiinnnnnngggggggg

But acc to current hypothesis universe is not expanding at all and its due toTimescape Cosmology: A Relativistic Perspective This model posits that the universe is not expanding uniformly. Instead, it suggests that gravitational time dilation—where time passes at different rates in regions of varying gravitational potential—can lead to the illusion of acceleration.

This means even scientist don't know whats really right or wrong about universe ...all the years of study and thinking that they know something more than a common man got down the vent😂😂😂...So on a larger time scale we all are equal in all respects even based on intelligence

Haven't the magnetic flux caused by electrostatic charges as proposed by me been found yet? This is a media which resoluted conclusion can be arrived! An optimised contrast between two orthogonal directions ought to be found to make best verification! By C.K. Lu

I love when Rachel Maddow teaches us about space

This guy should play Willy Wonka 😂

I like to think of it as if someone is blowing up a balloon 🎈

I really want to know what if not God made all of this!! It drives me crazy thinking about it. I WANT TO KNOW!!

The universe is not expanding and it is bad science that tries to tell us it is.