Dark Matter May NOT Exist. Here’s Why

Why some physicists think Dark Matter DOESNT EXIST

As Veritasium points out in “Absurd Search for Dark Matter”, Dark Matter is something in physics/astronomy/science that has failed to be detected. Although Veritasium pushed aside alternatives like MOND, this vid let’s look why they exist, what they say and if dark matter is as real as some say

[JCho]

just want to say your content is awesome, I was super into dinosaurs and astrophysics when I was younger so your page is like a little taste of home, with a bunch of science I don’t keep up with nearly enough. Love your work and hope you keep it up

[crazygamer]

Scientists need to account for all the stars and powerful objects emitting radiation and how this interacts with galactic gases. Fluid dynamics are certainly important as the gases behave like currents in the earth's ocean

[HakunaMatata-osog]

When you see something gravitationally that you did not expect, and you find no particles to explain it, and it occurs in an area of spacetime (low mass) that is unintuitive or unfamiliar to humans, my best guess is that the shape of spacetime itself is not always what we expect. In relatively high mass regions of spacetime, which is a thing familiar to us humans, living inside of a solar system, within a galaxy, as we do, things are relatively flat and well grounded, with dips corresponding to intense gravitational concentrations (planets, stars, black holes, etc.), with the steepest dips belonging to the most gravitationally intense objects. What about areas of spacetime not nailed down by gravitational objects of sufficient size and quantity? We might assume it would be the same there also, but maybe not. Perhaps spacetime leavens or billows upwards, ever so slightly, in areas of low mass, with larger expanses of low mass spacetime seeing a correspondingly more pronounced effect. What would this positively curved spacetime do? Well, at slighter curvatures, it could cause a gravitationally repulsive effect all along the curve, pushing together things like galaxies, which exist on the edges of such positively curved spacetime, thus accounting for the effects we attribute to dark matter. In deeper voids, such the the spaces between galaxy clusters, the positive curvature could create sufficient repulsive effect, that new spacetime is diffusely created over the intervening parsecs. This would be like a white hole, but extremely diffuse, albeit still very noticeable on the vast scales of the universe. This could account for what we see in dark energy. So there you have it. Both dark energy and dark matter explained by the ever-so-slightly positive curvature of spacetime in regions of low mass, where it billows outwards like a sail, with no points of mass to nail it down.

[Dyslexic-Artist-Theory-on-Time]

I think dark matter will be explained away with the use of holographic principle as part of a process that forms the characteristics of three dimensional space with one variable, time.

[shawns]

There is an elephant in the room explanation for those abnormally high star rotation rates. Einstein explained it in the 1939 journal "Annals of Mathematics". Wherever you have an astronomical quantity of mass "dilation" (sometimes called gamma or y) will occur. Mass that is dilated is smeared through spacetime relative to an outside observer. If you look at a common relativity graph the phenomenon is clear, even mass that exists at 75% light speed is partially dilated.
There is no place in the universe where mass is more concentrated than at the center of a galaxy. 99.8% of the mass in our solar system is in the sun. 99.9% of the mass in an atom is in the nucleus. If these norms are true for galaxies than we can infer that there is 100's of trillions of solar masses at the center of common spiral galaxies. There is no way to know through observation, there is far too much interference, dilation and gravitational lensing. High mass means high momentum. If we attribute a radius to these numbers than we can calculate that relativistic velocities exist in these regions, the same way we could calculate the surface rotation of the sun if we doubled the mass.
The mass at the center of our own galaxy is dilated. In some sublime way that mass is all around us because as the graph shows we are still connected to it. There is no "mystery" mass there is just mass at differing degrees of dilation.
It was recently discovered that low mass galaxies (like NGC 1052-DF2) have normal star rotation rates. This is what relativity would predict because there is an insufficient quantity of mass to achieve relativistic velocities. This is virtual proof that dilation is the governing phenomenon at galactic centers, there can be no other realistic explanation for this fact.

[DinoDiniProductions]

... or just photons losing energy over very long distances. Perhaps through interactions with interstellar particulates. Is it really reasonable to assume that your average photon remains completely unchanged over billions of years of travel? That is the assumption.

[michaelkahn]

I've been saying that "Dark Matter and Dark Energy don't exist" since 2022.
We've spent almost a century to find Dark Matter and Dark Energy but still there's no sign of them.
No matter what we try, a thing which doesn't exist can't be found. May be it is time to find an Alternative Way to Explain Dark Matter and Dark Energy.
4-D Hypershere model of Universe can easily explain Dark Matter, Dark Energy, Void and even the reason why the measurement values of Expansion Rate are around 70 km/sec-Mpc.
Dark Matter, Dark Energy, Gravity, Void and Antigravity, ... all these are same phenomena. They just look different.

I agree to the idea that the interaction between mass and space must be explained with quantum mechanics.
But that doesn't mean gravity is the QM phenomena.
That's because gravity is not a force.
Dark Matter, Dark Energy, Gravity, Antigravity, Void... all these are just joint effects of the expansion of the Universe and the curvature of spacetime.
Details are given below.

Einstein’s theory of General Relativity states that spacetime is curved by the presence of mass.
This curvature influences the motion other objects with mass and gives rise to gravitation.
Thus, gravity is a result of geometric features in spacetime.
However, we also observe gravitational effects – curvature of spacetime – in areas without any detectable mass.
This has given rise to the concept of dark matter, which is matter that does not interact in any detectable way with normal matter, except through gravity.
So, there is some large quantity of dark matter scattered throughout the universe, which curves spacetime and causes gravitational effects just like normal matter, but we cannot see or detect it with any known method.

An alternative theory to the identity of dark matter is proposed – it is not matter at all, but rather an intrinsic curvature of spacetime.
In other words, spacetime is not naturally flat. Even in the absence of matter, we observe some inherent curvature of spacetime.

So, the question is now – why is spacetime naturally curved? Why is it not flat in the absence of mass?
The universe is 4-dimensional, with 3 spatial dimensions and one dimension in time.
Rather than consider time as a linear dimension, we can consider it as a radial one.
Therefore, rather than describing the universe with a Cartesian coordinate system, we describe it with a 4-dimensional spherical coordinate system – 3 angular coordinates, φ1, φ2, φ3, and one radial coordinate in time, t.
We live on the 3-dimensional surface of a 4-dimensional bubble which is expanding radially in time.
Thus, the Big Bang represents t=0, the beginning of time.
The crucial point is that the expansion of the universe is not homogeneous in all directions.

The expansion rate at one point on the bubble’s surface may differ slightly from another point near it.
The universe is only roughly spherical in 4 dimensions, the same way that the Earth is only roughly spherical in 3 dimensions.
The same way we observe local mountains and valleys on the surface of Earth, we observe local “mountains” and “valleys” on the surface of the universe bubble.
The inhomogeneity of the expansion of the universe has given rise to natural curvature of spacetime. This natural curvature causes the phenomenon of “dark matter”. “Valleys” in spacetime pull matter in, similarly to the warping of spacetime of massive objects.
So “dark matter” is really “valleys” in spacetime that are expanding slower than the regions surrounding it.
These valleys tend to pull matter in and create planets, stars, and galaxies – regions of space with higher-than-average densities of mass.
Conversely, “mountains” in spacetime will repel matter away, an “anti-gravitational” effect, which gives rise to cosmic voids in space where we observe no matter.
Each point on the surface of the universe bubble traces out a time arrow in 4-dimensional space, perpendicular to the surface.
These time arrows are not parallel to each other since the universe is not flat.
This causes points to have nonzero relative velocity away from each other.
It is generally accepted that the universe is expanding faster than observable energy can explain, and this is expansion is believe to be still accelerating.
The “missing” energy required to explain these observations has given rise to the theory of dark energy.
The time dilation caused by non-parallel time arrows can be proposed as an explanation for dark energy.

Alternatively, dark energy is real energy coming from potential energy gradients caused by non-parallel time arrows.
As a sanity check, we can calculate the expansion rate of the universe based on the universe bubble model.
Since the radius of the universe bubble is expanding at the speed of light in the time direction, it increases at 1 light second per second.
Therefore, the “circumference” of the 3-dimensional surface increases by 2π light seconds per second, or about 1.88*10^6 km/s.
This expansion is distributed equally across the 3-dimensional surface, so the actual observed expansion rate is proportional to the distance from the observer.

At present, the age of the universe is estimated to be 13.8 billion years, so the radius of the universe bubble is 13.8 billion light years, or about 4233 megaparsecs (3.26 million light years to 1 Mpc).

Thus, we can calculate the expansion rate of the universe, per megaparsec from the observer, as:

Expansion rate =

The popularly accepted empirical expansion rate is 73.5 +/- 2.5 km/s/Mpc, so our calculated value is close.
There may be some additional source of expansion (or observed red shift) to make up for the discrepancy. For example, if two adjacent points have some gravitational gradient due to non-parallel time arrows, then light passing through these points will be red-shifted.