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Geraint Lewis

Professor of Astrophysics, Sydney Institute for Astronomy

Geraint F. Lewis is a Professor of Astrophysics at the Sydney Institute for Astronomy, part of the University of Sydney’s School of Physics. He is best known for his work on dark energy, gravitational lensing, and galactic cannibalism, the study of galaxies which collide and absorb parts of each other.​

​At Sydney, Lewis is head of the Gravitational Astrophysics Group. He was previously the Associate Head for Research at the School of Physics and held an Australian Research Council Future Fellowship between 2011 and 2015. Lewis won the 2016 Walter Boas Medal in recognition of excellence in research in Physics. He is currently Deputy Director of the Sydney Informatics Hub, a core facility of the University of Sydney. Lewis has a Bachelor’s in Physics and Astronomy from University of London and a Doctorate in Astronomy from University of Cambridge. He was born in Wales.