Martin Rees

The Right Honourable
The Lord Rees of Ludlow
OM FRS HonFREng FMedSci FRAS HonFInstP
The Right Honourable The Lord Rees of Ludlow OM FRS HonFREng FMedSci FRAS HonFInstP
	Official portrait, 2019
15th Astronomer Royal
	In office; 1995–2025
Preceded by	Arnold Wolfendale
Succeeded by	Michele Dougherty
60th President of the Royal Society
	In office; 2005–2010
Preceded by	The Lord May of Oxford
Succeeded by	Paul Nurse
78th President of the Royal Astronomical Society
	In office; 1992–1994
Preceded by	Ken Pounds
Succeeded by	Carole Jordan
39th Master of Trinity College, Cambridge
	In office; 2004–2012
Preceded by	Amartya Sen
Succeeded by	Sir Gregory Winter
Member of the House of Lords
	Lord Temporal
	Life peerage ; 6 September 2005
Personal details
Born	23 June 1942; York, England
Party	None (crossbencher)
Spouse(s)	Dame Caroline Humphrey, Lady Rees (m. 1986)
Website	www.ast.cam.ac.uk/~mjr/
Scientific career
Education	Shrewsbury School
Alma mater	Trinity College, Cambridge (BA, PhD)
Known for	Rees–Sciama effect; 21-cm cosmology; Coining particle chauvinism
Awards	Dannie Heineman Prize for Astrophysics (1984); Gold Medal of the Royal Astronomical Society (1987); Balzan Prize (1989); Bower Award (1998); Gruber Prize in Cosmology (2001); Albert Einstein World Award of Science (2003); Michael Faraday Prize (2004); Crafoord Prize (2005); Order of Merit (2007); Templeton Prize (2011); Isaac Newton Medal (2012); Dalton Medal (2012); HonFREng (2007); Nierenberg Prize (2015); Fritz Zwicky Prize (2020); Copley Medal (2023); Wolf Prize in Physics (2024)
Fields	Astronomy; Astrophysics
Institutions	University of Cambridge; University of Sussex
Thesis	Physical processes in radio sources and inter-galactic medium (1967)
Doctoral advisor	Dennis Sciama
Doctoral students	Roger Blandford; Craig Hogan; Priyamvada Natarajan; James E. Pringle; Nick Kaiser;

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Martin John Rees, Baron Rees of Ludlow, (born 23 June 1942) is a British cosmologist and astrophysicist. He was the fifteenth Astronomer Royal from 1995 to 2025, Master of Trinity College, Cambridge, from 2004 to 2012, and President of the Royal Society from 2005 to 2010. He has received various physics awards including the Wolf Prize in Physics in 2024 for fundamental contributions to high-energy astrophysics, galaxies and structure formation, and cosmology.