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.
For 10 months, a SETI Institute-led team watched pulsar PSR J0332+5434 (also called B0329+54) to study how its radio signal "twinkles" as it passes through gas between the star and Earth. The team used the Allen Telescope ...
Astronomy
Dec 10, 2025
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Galaxies like our Milky Way grew through cascading mergers of smaller galaxies that began billions of years ago. The ancient progenitors of galaxies like ours were small galaxies similar to modern-day dwarf galaxies like ...
Astronomy
Dec 3, 2025
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A spiral galaxy, shaped much like our Milky Way, has been found in an era when astronomers believed such well-formed galaxies could not yet exist. Two astronomers from India have identified a remarkably mature galaxy just ...
Astronomy
Dec 2, 2025
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An international team of astronomers reports the discovery of a new dusty star-forming galaxy at high redshift. The newfound galaxy, designated AC-2168, was detected using the Atacama Large Millimeter/submillimeter Array ...
Researchers using the NASA/ESA/CSA James Webb Space Telescope have confirmed an actively growing supermassive black hole within a galaxy just 570 million years after the Big Bang. Part of a class of small, very distant galaxies ...
Astronomy
Nov 19, 2025
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The discovery of a superheated star factory that forms stars 180 times faster than our own Milky Way could help solve a long-standing puzzle about how galaxies grew so quickly in the early universe.
Astronomy
Nov 12, 2025
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Astronomers using the James Webb Space Telescope (JWST) have captured the most detailed look yet at how galaxies formed just a few hundred million years after the Big Bang—and found they were far more chaotic and messy than ...
Astronomy
Oct 21, 2025
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Using the James Webb Space Telescope (JWST) and the Atacama Large Millimeter/sub-millimeter Array (ALMA), an international team of astronomers has carried out comprehensive multiwavelength observations of a distant massive ...
When the James Webb Space Telescope (JWST) began operations, one of its earliest surveys was of galaxies that existed during the very early universe. In December 2022, these observations revealed multiple objects that appeared ...
Astronomy
Oct 18, 2025
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Astronomers hunting for evidence of the light from the first stars and galaxies have found that the universe was warm, rather than cold, before it "lit up."
Astronomy
Sep 30, 2025
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