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.
By combining data from the DESI Legacy Imaging Surveys and the Gemini South telescope, astronomers have investigated three ultra-faint dwarf galaxies that reside in a region of space isolated from the environmental influence ...
Astronomy
Jan 15, 2025
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In December 2022, less than six months after commencing science operations, NASA's James Webb Space Telescope revealed something never seen before: numerous red objects that appear small in the sky, which scientists soon ...
Astronomy
Jan 14, 2025
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Astronomers have discovered an important piece of the puzzle of how supermassive black holes were able to grow so quickly in the early universe: a special kind of active galactic nucleus so distant that its light has taken ...
Astronomy
Dec 18, 2024
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An international research team has used the James Webb Space Telescope (JWST) to observe massive galaxies discovered by the Subaru Telescope in a corner of the early universe known as the Spiderweb protocluster. The JWST ...
Astronomy
Dec 18, 2024
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For the first time, the NASA/ESA/CSA James Webb Space Telescope has detected and "weighed" a galaxy that not only existed about 600 million years after the Big Bang, but also has a mass that is similar to what our Milky Way ...
Astronomy
Dec 11, 2024
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An international team led by the University of Geneva (UNIGE) has identified three ultra-massive galaxies—nearly as massive as the Milky Way—already in place within the first billion years after the Big Bang.
Astronomy
Nov 13, 2024
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A quasar is the extremely bright core of a galaxy that hosts an active supermassive black hole at its center. As the black hole draws in surrounding gas and dust, it blasts out an enormous amount of energy, making quasars ...
Astronomy
Oct 17, 2024
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Astronomers have used the NASA/ESA James Webb Space Telescope (JWST) to observe the 'inside-out' growth of a galaxy in the early universe, only 700 million years after the Big Bang.
Astronomy
Oct 11, 2024
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Reionization is a critical period when the first stars and galaxies changed the physical structure of their surroundings, and eventually the entire universe. Established theories state that this epoch ended around 1 billion ...
Astronomy
Oct 10, 2024
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Researchers have discovered the most distant Milky-Way-like galaxy yet observed. Dubbed REBELS-25, this disk galaxy seems as orderly as present-day galaxies, but we see it as it was when the universe was only 700 million ...
Astronomy
Oct 7, 2024
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