At first glance, the universe seems simple: stars, gas, dust, and gravity holding it all together. Then, when you look more carefully, you realize that nothing could be further from the truth.
For decades, standard imagery has told us that most of what is out there is not what we can see. It is a mixture of ordinary matter and two invisible components, often called dark matter and dark energy.
Its photographs have guided textbooks, space missions, and how to read the sky. It also raises difficult questions that will never go away, mainly due to the fact that dark matter and dark energy have never actually been “seen.”
After decades of searching for this elusive “dark matter,” at what point will the scientific community decide that it may not actually exist?
Challenging the existence of dark matter
New thinking takes these questions seriously and suggests that we may not need those “dark” invisible components after all.
After spending years unraveling long-standing cosmological mysteries, physics professor Rajendra Gupta has proposed a model that aims to explain the universe without dark matter or dark energy.
Mr. Gupta, who teaches astrophysics at the University of Ottawa, argues that well-known assumptions may be holding back progress.
“Our results confirm our previous work (JWST Early Universe Observations and ΛCDM Cosmology), which found that the universe is 26.7 billion years old, and that dark matter is not required for the universe to exist,” explains Gupta.
“Tired light” and CCC theory
Gupta’s approach combines two concepts: covariation coupling constant (CCC) and “tired light” (TL).
CCC asks whether so-called constants of nature, such as the strength of a force or the speed of light, can vary across time and space. If even a small amount of that were to happen, it would change many calculations about how the universe evolves.
TL offers an alternative view of why light from distant galaxies appears redshifted. Rather than treating redshift solely as a sign of the expansion of the universe stretching light, TL suggests that photons release energy over long distances, changing their color to red.
Overall, the CCC+TL model tries to account for cosmic signals.
Most scientists believe dark matter is real
The idea of dark matter didn’t arise in a vacuum. In the 1930s, astronomer Fritz Zwicky noticed that galaxy clusters appeared to move in ways that were inconsistent with their visible mass.
Astronomers then discovered that many galaxies were rotating faster than expected around them. It looks like something is adding extra gravity. Gravitational lenses, a mechanism by which mass bends light, also exhibit a gravitational force that cannot be explained by starlight alone.
The standard breakdown is that dark matter makes up about 27% of the universe. Ordinary substances, all the things we can directly detect, add up to less than 5%.
The rest is labeled dark energy and is a placeholder for anything that causes the accelerated expansion of the universe. This picture also includes a generally accepted age of approximately 13.8 billion years.
Questioning the need for dark matter
If the forces of nature weaken over time, Gupta argues, dark energy is not needed to explain why expansion appears to be accelerating.
He also claims that by varying the constant so that light loses small amounts of energy as it travels long distances to reach us observers, we can reconcile key observations without dark matter.
“In contrast to standard cosmology, which attributes the accelerating expansion of the universe to dark energy, our results show that this expansion is due to a weakening of the forces of nature rather than dark energy,” continued Professor Gupta.
Redshift and space observation
A significant portion of the research focuses on redshift, or how light shifts toward longer wavelengths as it travels.
This analysis compares the distribution of galaxies at low redshifts with the pattern in the early universe at high redshifts.
These signals are claimed to align under the CCC+TL approach without the need for dark matter in the equation.
“There have been several papers questioning the existence of dark matter, but to my knowledge, my paper is the first to rule out its cosmological existence while being consistent with important cosmological observations that have been confirmed over time,” concluded Gupta confidently.
What does this mean?
If CCC+TL continues to pass the test, a lot will change. The model could provide a new way to explain the cosmic microwave background, the timeline of galaxy formation and growth, and the way light bends to reach telescopes.
Since redshift will no longer be just a measure of expansion, the way we read distance and time from the sky will also change.
It will challenge the timeline fixed in the Big Bang. These are important claims and require careful testing.
Verification of the gupta theory
Specific predictions need to be made clear. Any model must respond head-on to observations such as galaxies’ rotation profiles, lensing maps, patterns of hot and cold spots in the microwave background, and how galaxies cluster over hundreds of millions of light-years.
Any small change in the constant can leave an imprint in the atomic spectrum from distant quasars. If the tire is light, its effect can be measured with sufficient precision and there must be a clear way to distinguish it from other causes.
The research team has already thoroughly studied deep space surveys, precise supernova samples, and high-resolution microwave maps.
As equipment improves, so does the bar for alternatives. The goal is simple. Make clear, testable predictions and see if the universe agrees.
Dark matter, CCC+TL, and next steps
Two major questions remain. Are dark energy and dark matter just bookkeeping devices we used when dealing with stories of fixed constants and single redshifts? Could the true age of the universe be much older than standard estimates?
The only way to get an answer is to seek independent testing that can separate one photo from another.
Researchers are fine-tuning how to fairly compare models using the same data pipeline and error checking. This will help you avoid apples-to-orange results.
If CCC+TL continues to match the sky, interest will increase. If you stumble on an important observation, that’s obvious too.
When claims and data match, cosmology moves forward. This study advances a bold alternative. That is, a universe where constants can change, light can lose energy over long distances, and neither dark matter nor dark energy needs to be included in the ledger.
It provides a clear and verifiable statement of the age of the universe and the causes of apparent acceleration.
Research is verified or refuted by measurements. This is how this field works. There are no shortcuts, no hand waving, only fit-or-fail observations and models.
The entire research is astrophysical journal.
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