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.
Using the wide-field survey capabilities of the Subaru Telescope, astronomers discovered active supermassive black holes, or quasars, in the distant universe and then studied them with the James Webb Space Telescope (JWST). ...
Astronomy
Sep 18, 2025
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Tiny red objects spotted by NASA's James Webb Space Telescope (JWST) are offering scientists new insights into the origins of galaxies in the universe—and may represent an entirely new class of celestial object: a black hole ...
Astronomy
Sep 12, 2025
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What was the universe like in the first few hundreds of millions of years after it came into existence? How did the first stars and galaxies form? Those are questions that astronomers now have a better chance of answering, ...
Astronomy
Sep 1, 2025
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Images taken with the MIRI infrared camera on the James Webb Space Telescope (JWST) have made it possible to observe the first galaxies in long-wavelength infrared light for the first time. Alongside a recent study published ...
Astronomy
Aug 25, 2025
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Astronomers at the Center for Astrophysics | Harvard & Smithsonian have proposed a new explanation for some of the universe's most puzzling early galaxies, nicknamed "little red dots."
Astronomy
Aug 11, 2025
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Astronomers have discovered a remarkably clumpy rotating galaxy that existed just 900 million years after the Big Bang, shedding new light on how galaxies grew and evolved in the early universe. Nicknamed the "Cosmic Grapes," ...
Astronomy
Aug 7, 2025
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Using the James Webb Space Telescope (JWST), an international team of astronomers has observed a distant faint galaxy designated JADES-GS-z14-1. Results of the observational campaign, published July 30 on the arXiv preprint ...
This image from the NASA/ESA/CSA James Webb Space Telescope revisits one of the most iconic regions of the sky, the Hubble Ultra Deep Field, through the eyes of two of Webb's instruments. The result is a detailed view that ...
Astronomy
Aug 2, 2025
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When the JWST began science observations in July 2022, it flung open a whole new window on the universe. The JWST looked further back in time than any other telescope, and it revealed several surprises. One of them was the ...
Astronomy
Jul 22, 2025
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Astronomers want to unlock the secrets of the "Cosmic Dawn" by sending a miniature spacecraft to listen out for an "ancient whisper" on the far side of the moon.
Astronomy
Jul 8, 2025
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