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About

Xiaohui Fan is a pioneering astrophysicist renowned for his transformative work on the most distant quasars and galaxies in the early universe. His key research areas include the formation and evolution of supermassive black holes, the epoch of reionization, and the cosmic dawn. Fan’s major contributions include leading the discovery of the first known quasars at redshifts beyond 6, pushing the observable frontier of the universe back to within a billion years of the Big Bang. His work has fundamentally reshaped our understanding of how supermassive black holes grew so rapidly in the early cosmos. With over 50,000 citations to his name, Fan’s impact is immense. He is a key figure in the Sloan Digital Sky Survey (SDSS), notably as a lead on SDSS-V, the first all-sky, multiepoch optical-to-infrared spectroscopic survey, which is pioneering panoptic spectroscopy to map the Milky Way and beyond. A recipient of the prestigious Helen B. Warner Prize and a member of the National Academy of Sciences, Fan’s legacy continues to inspire the next generation of astronomers exploring the universe’s first light.