Geraint Lewis

Professor Geraint Lewis is a faculty member in the Department of Physics at the University of Sydney, affiliated with the Faculty of Science. His research focuses on cosmology, astrophysics, and galactic evolution, particularly investigating dark energy, dark matter, gravitational lensing, and the structure of the Milky Way and Andromeda galaxies. He collaborates internationally with institutions such as the University of Strasbourg and the University of Cambridge.

His work includes studying stellar streams from disrupted dwarf galaxies, probing cosmic expansion through quasar time dilation, and analyzing the distribution of dark matter using gravitational lensing. He actively supervises PhD students in topics like cosmological principles, galaxy evolution, and dark matter properties.

Prof. Lewis has contributed to major projects like the Dark Energy Survey (DES) and the GALAH survey, which explore supernovae, galaxy formation, and stellar abundances. His research aligns with the university's 'Understanding the Universe' research theme, addressing fundamental questions about the universe's structure and fate.

He has published extensively in journals such as Nature Astronomy, Monthly Notices of the Royal Astronomical Society, and The Astrophysical Journal, covering topics from gravitational lensing to the philosophical implications of cosmic fine-tuning.