On April 19, 2026, the Faculty of Physics and Engineering Physics, University of Science, Vietnam National University Ho Chi Minh City (VNUHCM-US), in collaboration with the USAC Astronomy Club, organized USACTalk #04, entitled “Beyond the Darkness – What Has JWST Revealed at the Edge of the Universe?” The seminar offered scientific insights into the early universe, galaxy formation, and the evolution of supermassive black holes through recent observations from the James Webb Space Telescope (JWST).
The seminar began with an introduction to fundamental concepts in gravitational physics, including escape velocity, gravitational light bending, and the structure of spacetime. These concepts provided a foundation for understanding physical phenomena in extreme gravitational environments and the evolution of the universe.
The presentation focused on significant discoveries made possible by JWST, particularly observations of early galaxies such as JADES-GS-z13-0 and GN-z11; the intriguing population of Little Red Dots (LRDs), whose characteristics may be associated with actively accreting black holes; and evidence of oxygen in galaxies dating back to approximately 300 million years after the Big Bang. These findings provide valuable insights into early galaxy formation, chemical enrichment, and the rapid evolution of the young universe.
The speaker also examined competing hypotheses concerning the formation of light and heavy black hole seeds, exploring the possibility that supermassive black holes and their host galaxies may have co-evolved during the early stages of cosmic history. In addition, the seminar highlighted the potential of JWST observations to test black hole accretion models and advance our understanding of black hole growth in the early universe.
The seminar concluded with an engaging discussion between the speaker and participants, encouraging scientific curiosity, academic exchange, and a deeper appreciation of contemporary astrophysics.
USACTalk #04 further demonstrated the value of the USACTalk seminar series in fostering academic engagement, connecting astronomy enthusiasts, and providing students with opportunities to explore advances in astronomical research.
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