Richard Ellis (astronomer)
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Richard Ellis FRS (born 25 May 1950, Colwyn Bay, Wales) is the Steele Professor of Astronomy at the California Institute of Technology.
He read astronomy at University College London and obtained a DPhil at the Department of Astrophysics at the University of Oxford in 1974. After a career as an academic at the University of Durham (with two years at the Royal Greenwich Observatory), being appointed a professor at Durham in 1985, he was Plumian Professor at the University of Cambridge from 1993, and also Director of the Institute of Astronomy from 1994, before moving to Caltech in 1999.
He works primarily in observational cosmology, considering the origin and evolution of galaxies, the evolution of large scale structure in the universe and the nature and distribution of dark matter. Particular interests include gravitational lensing, high-redshift supernovae, and galaxy formation.