False. It has taken over a century to "theorize" the early universe and explain it all as "evolution."
You're right—but that is non-sequitur, because that isn't what I was talking about.
This is information from an article in Phys Org.
The Big Surprise From Webb Telescope, Map of Early Universe (University of California, Santa Barbara)
"The best measurements from Hubble suggested that galaxies within the first 500 million years would be incredibly rare," ...
It is super frustrating when people claim that something came from a specific source but fail to provide any proper citation.
I did a web search for "big surprise from webb telescope" and guess what I found?
Nothing.
There are no results for: "big surprise from webb telescope"
I had to do a search for the sentence "The best measurements from Hubble suggested that galaxies within the first 500 million years would be incredibly rare." And that produced a lot of results from Facebook and Tumblr—which, for obvious reasons, are not credible sources. (And I had no idea Tumblr was still a thing.)
I did eventually find the article—on the second page of the search results and with a different title:
- Sonia Fernandez, "Largest Map of the Universe Announced Revealing 800,000 Galaxies, Challenging Early Cosmos Theories," Phys.org, June 5, 2025. https://phys.org/news/2025-06-largest-universe-revealing-galaxies-early.html
So, what was QVQ on about? Here is the quote in its entirety:
"The big surprise is that, with the JWST, we see roughly 10 times more galaxies than expected at these incredible distances," said Caitlin Casey, a physics professor at the University of California, Santa Barbara. She also co-leads the major astronomical survey program
COSMOS-Web, which uses the JWST to map a large area of the sky in infrared wavelengths. "We are also seeing supermassive black holes that are not even visible with Hubble," she added. The author of the article, Fernandez, added that they're "not just seeing more, they're seeing different types of galaxies and black holes."
Okay, so what's the problem? Well, QVQ helpfully specified that by including the fact that "the best measurements from Hubble suggested that galaxies within the first 500 million years would be incredibly rare," Casey said. "It makes sense. The Big Bang happens and things take time to gravitationally collapse and form, and for stars to turn on. There's a timescale associated with that."
In other words, what the JWST was showing us defied their predictions and expectations. Why?
Part of the answer is in the quoted material. The problem was the Hubble Space Telescope (HST). You see, their predictions were drawn from modeling that was based on a synthesis of HST deep fields (e.g., HUDF) which showed "nearly 10,000 galaxies" in a tiny patch of sky. So, that many galaxies of that luminosity at that early age of the universe means a certain rate of star formation. (Caution: I am really, really oversimplifying things here.)
But the HST data provided only a partial picture. One of its earlier instruments, NICMOS, reached up to 2.5 μm—a remarkable capability for its time—but this was
the upper limit imposed by Hubble’s warm optics. In reality, its deep-field surveys like the HUDF relied on WFC3/IR, which never went beyond 1.7 μm. The HST could cover ultraviolet, visible, and near-infrared wavelengths but never further than 2.5 μm into the infrared spectrum (and only with NICMOS). The JWST, by contrast—with a mirror almost three times the diameter, and a suite of cryogenically cooled instruments (NIRCam and MIRI)—can observe from about 0.6 μm to 28 μm, extending much further into the infrared than HST ever could. (One should also keep in mind that the JWST was looking at a patch of sky 300 times larger than what the HST did, which was 2.6 arcminutes
2.)
That is the reason for the surprise. It's not because Big Bang cosmology is all wrong (it's not), but that there were far more stars and galaxies in the early universe than the HST had led us to believe (due to its instrument limitations). The JWST has allowed scientists to refine their calculations for star formation rates, now that they have more accurate data. In other words,
- this is an observational bias correction, not a failure of Big Bang cosmology.
The theory is fine. It is the math that needed work.
The results were also overblown in the media with exaggerated reporting aimed at getting clicks, with no follow-up reporting on better data that changed the analysis. They often relied upon preliminary, non-peer-reviewed photometric redshift estimates that were often overestimated due to calibration uncertainties in the JWST's early data. Subsequent spectroscopic follow-ups have clarified that many galaxies are less distant or massive than initially thought. For example, the galaxy AzTECC71, initially thought to be at z ≈ 10, was confirmed at z ≈ 5, fitting ΛCDM expectations.
Summary: The Big Bang theory holds that the universe began in a hot, dense state about 13.8 billion years ago and has been expanding and cooling ever since. Over time, matter coalesced under gravity to form stars and galaxies hundreds of millions of years later—including our own galaxy. Both the HST and the JWST have seen galaxies from when the universe was very young—even 500 million years old or less. Using deep-field observations, the HST identified around 10,000 galaxies, including only a few dozen from within the first 600 million years after the Big Bang. The JWST, by contrast, has dramatically expanded our view: The COSMOS-Web survey alone has cataloged nearly 800,000 galaxies, including about 717 at z > 8—almost 50 times more early galaxies than Hubble detected—and it's requiring scientists to refine their calculations. But it's not undermining the Big Bang model itself, which remains robust as the foundation of modern cosmology.
Edited to add:
Paul Sutter, "
No, the Big Bang Theory Is Not ‘Broken’ -- Here’s How We Know,"
Space.com, January 30, 2023.
For the record-breaking galaxies that could be tension with cosmological models, the researchers relied on something called a photometric redshift, which fits a rough light spectrum of a galaxy to a model to estimate a distance.
That method is notoriously unreliable, with simple effects—like excess dust surrounding the galaxies—making them appear more distant than they really are.