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About

Daniel J. Eisenstein is a leading cosmologist whose work is central to understanding the accelerating expansion of the universe. His primary research focuses on dark energy, baryon acoustic oscillations (BAOs), and the large-scale structure of the cosmos. As the Director of the Dark Energy Spectroscopic Instrument (DESI), he has been instrumental in designing and building one of the most ambitious astronomical instruments ever created. His major contributions include leading the development of DESI’s revolutionary robotic focal plane system, which uses 5,020 independently-actuated fiber positioners to capture spectra from tens of millions of galaxies and quasars. This technological marvel, detailed in papers with over 400 combined citations, enables the most precise 3D map of the universe ever constructed. In 2023, Eisenstein and the DESI collaboration achieved a landmark milestone with the first detection of the BAO signal from early survey data, using 261,291 luminous red galaxies to confirm the instrument’s extraordinary potential. His work on the DESI experiment, which will measure 40 million cosmic objects, represents a paradigm shift in observational cosmology, promising to unlock the mysteries of dark energy and cosmic structure formation.