John E. Baldwin


John Evan Baldwin FRS[1] (6 December 1931 – 7 December 2010) was a British astronomer who worked at the Cavendish Astrophysics Group[2] (formerly Mullard Radio Astronomy Observatory) from 1954. He played a role in the development of interferometry in Radio Astronomy, and later astronomical optical interferometry and lucky imaging. He made the first maps of the radio emission from the Andromeda Galaxy and the Perseus Cluster, and measured the properties of many active galaxies. In 1985 he performed the first Aperture Masking Interferometry observations, and then led the construction and operation of the Cambridge Optical Aperture Synthesis Telescope,[3] and helped develop the lucky imaging method. In 2001 he was awarded the Jackson-Gwilt Medal[4] for his technical contributions to the fields of interferometry and aperture synthesis.[3]

John E. Baldwin

Prof. John Baldwin in the Cavendish Laboratory
Prof. John Baldwin in the Cavendish Laboratory
Born(1931-12-06)6 December 1931
Died7 December 2010(2010-12-07) (aged 79)
Alma materQueens' College, Cambridge
Known forCambridge Optical Aperture Synthesis Telescope
Aperture Masking Interferometry
Spouse(s)Joyce Cox
AwardsJackson-Gwilt Medal
Scientific career
ThesisA study of cosmic radio sources of large angular size (1956)
Doctoral advisorMartin Ryle

He matriculated as a member of Queens' College, Cambridge in 1949 and was a Life Fellow of the College from 1999 to his death in 2010.


  1. ^ Longair, M. S. (2011). "John Evan Baldwin. 6 December 1931 -- 7 December 2010". Biographical Memoirs of Fellows of the Royal Society. 57: 3–23. doi:10.1098/rsbm.2011.0011.
  2. ^ Astrophysics Group members - John Baldwin Archived 2005-11-01 at the Wayback Machine
  3. ^ a b "The Observatory". 121 (1165). 2001: 353. {{cite journal}}: Cite journal requires |journal= (help)
  4. ^ "Medallists of the Royal Astronomical Society". Royal Astronomical Society. Archived from the original on 16 July 2011. Retrieved 1 October 2009.

External linksEdit

  • - John Baldwin's page at the MRAO
  • - Photo of John Baldwin with Jan Hendrik Oort, Bob Rubin and Vera Rubin