Portuguese 
English 
Spanish 
5 min of reading 
0 comments 
A hypothesis by astrophysicist Rajendra Gupta from the University of Ottawa proposes that the universe could be about 26.7 billion years old, almost double the current estimate of 13.8 billion. The model attempts to dispense with dark matter and address tensions raised by the James Webb Space Telescope regarding very ancient galaxies.
The age of the universe is not just a number in the history of science. It underpins calculations about the formation of the first stars, the growth of galaxies, cosmic expansion, and the entire structure of the model scientists use to explain the cosmos. Therefore, when a researcher proposes that the universe could be approximately twice the age currently accepted, the hypothesis doesn’t just change a date; it attempts to reorganize a significant part of modern cosmology. This is the proposal of Rajendra Gupta, an astrophysicist at the University of Ottawa, Canada, released by the university itself and reported by the portal O Antagonista on June 11, 2026.
The current model most accepted by cosmologists, called Lambda CDM, establishes that the universe is about 13.8 billion years old. Gupta’s hypothesis stretches this timeline to approximately 26.7 billion years by combining two alternative concepts: the tired light theory and the so-called covariant coupling constants. The proposal gained attention because it attempts to address a real tension raised by the observations of the James Webb Space Telescope: the existence of galaxies that seem too large, bright, or mature for times so close to the beginning of the universe, at least within certain readings of the standard model. The research was presented by the University of Ottawa as a study that challenges the current model and suggests a universe without dark matter, according to the institution’s official release.
What is the standard model and why it is under pressure
The Lambda CDM is the foundation of contemporary cosmology. It combines the Big Bang, the expansion of the universe, ordinary matter, dark matter, and dark energy to explain a large set of observations accumulated over decades. The European Space Agency, when disclosing the results of the Planck mission, reinforced the age of 13.8 billion years and a cosmic composition in which ordinary matter, dark matter, and dark energy appear in well-defined proportions.
-
China completes giant offshore project with 400 MW of solar energy, green hydrogen, and offshore batteries to try to solve the biggest problem of renewables: producing clean energy without relying solely on the sun.
-
Researchers who analyzed 197 countries and territories warn that 1.8 billion adults do not move enough, putting their heart, metabolism, and mental health at risk due to an increasingly sedentary routine.
-
Why humanity may never leave the Solar System? Physics, relativity, and entropy challenge the dream of traveling to other stars.
-
Unprecedented discovery shows that a molybdenum oxychloride crystal can act as a metal or glass depending on the direction of illumination, breaking scientific paradigms and paving the way for photonic devices with real-time controllable properties.
The problem is that dark matter, a central component of this model, has never been directly detected. It emerged as an explanation for gravitational effects that visible matter alone cannot justify, such as the rotation speed of galaxies and the formation of large-scale structures. Its presence is inferred by its observed effects, not by direct measurement. This point is precisely one of the main targets of Gupta’s alternative hypothesis, which tries to follow another path without resorting to this invisible component.
How the 26.7 Billion-Year Hypothesis Works
Gupta’s proposal combines two distinct elements. The first is the tired light theory, which suggests that light loses energy as it travels long distances in space, which would alter the interpretation of the redshift observed in distant galaxies, currently used as one of the main indicators of the universe’s expansion. The second element is the covariant coupling constants, which propose that certain fundamental physical constants may vary over cosmic time.
By combining these two concepts, Gupta’s model offers an alternative reading of the same observational data that supports the Lambda CDM, without needing to introduce dark matter as a necessary component. Instead of adding invisible matter to the universe, the researcher proposes that part of what we interpret as evidence of dark matter may arise from a different formulation of cosmic expansion and the evolution of physical constants. It is worth noting that the University of Ottawa itself presented the research as a study that “challenges the current model,” not as a theory already validated or accepted by the scientific community.
The Role of James Webb in the Tensions the Hypothesis Tries to Resolve
Since the James Webb Space Telescope began operating, observations of extremely distant, and therefore extremely ancient, galaxies have brought a set of data that has sparked debate among cosmologists. Some of these galaxies appear too structured, massive, or mature for times so close to what would be the beginning of the universe within the 13.8 billion-year model. By proposing a universe nearly 26.7 billion years old, Gupta’s hypothesis offers more time for these complex structures to form, reducing the apparent contradiction between what James Webb observes and what the standard model predicts.
Still, many astronomers argue that some of these tensions may decrease with more precise measurements of distance, mass, dust, brightness, and star formation, meaning the problem may lie in the still incomplete data, not necessarily in the model. The alternative hypothesis seeks to reinterpret the redshift observed in light, reduce dependence on dark matter and dark energy, and adjust James Webb’s data without completely abandoning the idea of cosmic expansion. Which of these approaches will prevail is a question that science itself has not yet answered.
Why the hypothesis still does not overturn the accepted model
An alternative scientific hypothesis needs to do more than solve a specific problem. It needs to predict phenomena accurately, withstand independent tests, engage with a broad set of data, and convince other research groups around the world. The Lambda CDM model remains dominant precisely because it explains many different phenomena at the same time, based on decades of observations that include cosmic background radiation, supernovae, gravitational lenses, and the large-scale structure of the universe.
The proposal by Gupta is recognized as provocative because it points to real tensions in current cosmology, especially those opened by James Webb. But, as highlighted by the portal O Antagonista, the hypothesis still faces strong resistance within the field and has not become a consensus.
Until it is independently tested and demonstrates the ability to explain with the same precision the broad set of data that supports the standard model, Gupta’s 26.7 billion-year-old universe remains a controversial and minority possibility, relevant enough to be discussed, but far from being a new definitive answer for the history of the cosmos.
If the age of the universe could be almost double what is believed today, what else could be wrong in the models we use to understand the cosmos?
Do you think dark matter actually exists or could it just be a gap in current models? Leave your opinion in the comments, this is one of the most open questions in modern science.
Be the first to react!