Primordial galaxies as a research area focuses on the formation, physical conditions, and early evolution of the first galactic systems emerging in the high-redshift Universe (z ≳ 6–15). It investigates how gas cooling, metal-free or metal-poor star formation, feedback from massive Population III and early Population II stars, and nascent black holes drove the buildup of stellar mass, chemical enrichment, and reionization of the intergalactic medium. This field integrates observations from deep near-infrared surveys and spectroscopy with cosmological hydrodynamical simulations and semi-analytic models to constrain dark matter halo assembly, baryonic physics, and the linkage between early galaxies and large-scale structure.
Think about a census. You could photograph every house in the country and produce a beautiful map, but without knocking on doors and asking questions, you'd know almost nothing about the people living in them.
Astronomy
May 29, 2026
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A large protocluster of galaxies that existed 12.6 billion years ago, first discovered with the Subaru Telescope, has been examined in detail using the James Webb Space Telescope (JWST). The study found that galaxies in crowded ...
Astronomy
May 26, 2026
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One of the most puzzling findings from the JWST's observations of the early universe is the size of black holes. According to our understanding of black hole growth, these early black holes are far more massive than expected. ...
Astronomy
May 20, 2026
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Astronomers may have found an explanation for one of the biggest mysteries revealed by the James Webb Space Telescope (JWST): why so many galaxies in the early universe appear unexpectedly bright in ultraviolet light. The ...
Scientists have discovered a galaxy as it was 13 billion years ago, 800 million years after the Big Bang. It contains possible evidence of the universe's first stars and is one of the most chemically primitive galaxies observed ...
Astronomers using the James Webb Space Telescope have made a surprising discovery about a galaxy long, long ago and far, far away: It isn't rotating. That's something only seen in the most massive, mature galaxies that are ...
Astronomy
May 9, 2026
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The launch of NASA's James Webb Space Telescope (JWST) in 2021 pushed the horizon of seeing the early universe, unveiling cosmic events just a few hundred million years after the Big Bang. Among the most striking discoveries ...
Astronomy
Apr 16, 2026
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A growing mystery in astronomy is the presence of gargantuan black holes—some weighing as much as a billion suns—existing less than a billion years after the Big Bang. According to the standard theory of black hole formation, ...
Astronomy
Apr 15, 2026
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For decades, astronomers were only able to study the universe's very first stars using theoretical models. Now, observations from the James Webb Space Telescope (JWST) have revealed what may be the most compelling evidence ...
The early universe is absolutely so far outside our understanding of how the world works it's hard to describe in words. Back then, the cosmos wasn't filled with stars and galaxies but with a boiling soup of quarks and gluons, ...
Astronomy
Apr 5, 2026
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