The James Webb Space Telescope wasn’t supposed to find any of this.

When it launched in late 2021, astronomers expected it would peer further back in time than any instrument in human history. They hoped to see the first faint galaxies — the small, dim, chemically simple ones that should have existed in the universe’s earliest moments.

What they got instead was something nobody expected. Not faint galaxies. Bright ones. Big ones. Galaxies that looked, in some ways, like they shouldn’t exist yet at all.

Four years on, the data is no longer surprising in the sense of being unexpected — it’s surprising in the sense that it’s increasingly hard to fit into the standard story of how the universe began. And a small but growing number of peer-reviewed papers are now asking a question that, until very recently, almost no serious cosmologist would have raised.

What if the universe is much older than we thought?

The galaxies that shouldn’t be there

The current record-holder for the most distant known galaxy is called MoM-z14, spotted by JWST and announced in 2025. Its redshift of 14.44 corresponds to a moment roughly 280 million years after the Big Bang. In cosmic terms, that’s almost no time at all — about 2% of the universe’s currently accepted age.

The previous record-holder, JADES-GS-z14-0, sits at around 300 million years after the Big Bang. And before that, a galaxy at 325 million years.

These aren’t faint smudges. JADES-GS-z14-0 is about five times more luminous than the previous record-holder. It’s also, by current estimates, several hundred million times the mass of the Sun.

“Nobody dreamed that there would be galaxies this bright at this high redshift,” said George Rieke, an astronomer at the University of Arizona’s Steward Observatory who worked on the discovery.

That alone is a problem. Standard galaxy formation models say that during the first few hundred million years, galaxies should have been small, dim, and only just beginning to assemble. They shouldn’t be massive. They shouldn’t be bright. They shouldn’t be there yet.

The chemistry that shouldn’t be there either

Then it got worse.

In early 2025, astronomers detected substantial oxygen in JADES-GS-z14-0 — the most distant detection of a heavy element ever made. The implications are not subtle.

Oxygen, like every element heavier than hydrogen and helium, doesn’t exist in the early universe. It has to be manufactured inside stars, then released when those stars die in supernovae. To find oxygen in a galaxy that supposedly formed less than 300 million years after the Big Bang, the universe needs to have already done something extraordinary. It needs to have built the first generation of stars, let them live, let them die, scattered their heavy elements into space, and then formed a second generation of stars from the enriched debris — all in less time than it takes for a tree on Earth to grow to maturity.

“It’s a very complicated cycle to get as much oxygen as this galaxy has,” Rieke said. “So, it is genuinely mind boggling.”

The discovery isn’t isolated. Multiple JWST surveys have now found early galaxies showing chemical signatures that imply they had been forming stars for at least 100 million years before being observed — meaning the actual first stars must have ignited even earlier than that.

In the standard cosmological model, there isn’t enough time for any of this. Astronomers have a name for the contradiction. They call it the “impossibly early galaxy problem.”

The paper that says the universe might be twice as old

Most cosmologists are responding to this by revising their models of how galaxies form, not by revising the age of the universe itself. The mainstream view is that galaxy formation in the early universe was faster and more efficient than anyone realised — but the universe is still roughly 13.8 billion years old.

A minority view is going further.

In September 2023, Rajendra Gupta — a physicist at the University of Ottawa — published a peer-reviewed paper in Monthly Notices of the Royal Astronomical Society, one of the most respected journals in astronomy.

Gupta’s proposal is striking. By combining two modifications to the standard cosmological model — a concept called “tired light” (where photons lose energy as they travel through space) and a framework in which the constants of physics vary over time — he derived a new age for the universe.

26.7 billion years.

Almost exactly twice the standard estimate.

In Gupta’s model, the universe at the redshift of JADES-GS-z14-0 is not 300 million years old. It’s nearly 4 billion years old. Suddenly, the existence of mature, oxygen-rich, massive galaxies at that point is no longer mysterious. They had plenty of time to form.

Why this isn’t yet a revolution

It’s important to be careful here. Gupta’s model is real, published, peer-reviewed — but it is not the consensus view. Most cosmologists don’t think the universe is 26.7 billion years old. They think there’s something wrong with our model of galaxy formation, not our model of cosmic chronology.

The standard Lambda-CDM cosmological model has survived an enormous number of observational tests over the past three decades. It successfully predicts the structure of the cosmic microwave background, the distribution of galaxies across the sky, the abundance of light elements, and the way the universe is expanding. Throwing it out would require explaining how all of those predictions could still happen to come out right even though the underlying timeline is wrong.

But Gupta’s paper isn’t alone. Other peer-reviewed papers — including work on what’s called an “ellipsoidal universe” model — have begun proposing modifications that would resolve the impossibly early galaxy problem by adjusting cosmic age. They are minority papers. They are also serious, published, and being cited.

When enough minority papers start asking the same question, the question stops being fringe and starts being interesting.

What happens next

JWST keeps observing. Every year it finds galaxies further back in time, and so far, every year the picture gets stranger rather than clearer.

If the trend continues — if we keep finding massive, chemically mature galaxies at redshifts that should be too early for them to exist — pressure will keep building on the standard model. Either galaxy formation theory needs a fundamental rework, or the cosmological framework itself does.

For now, the safest position is this: the universe is almost certainly around 13.8 billion years old. But the gap between almost certainly and certainly has gotten meaningfully wider in the last four years.

We have, for the first time in modern cosmology, real published papers in real journals asking whether the entire timeline might be wrong.

That doesn’t happen often. It’s worth noticing when it does.