[9] Kahn was educated at St Paul's School, London from 1940 to 1944,[6] after which he secured an open scholarship to The Queen's College, Oxford.
According to his certificate of election as a Fellow of the Royal Society: Franz Kahn has made many original contributions to plasma astrophysics, cosmical gas dynamics and the physics of star formation, with significant early papers on the structure of ionisation fronts and collision-free shocks.
More recently he has done important work on stellar winds and galactic fountains, on planetary nebulae and on remnants of novae and supernovae.
His versatility is shown by papers on the spiral structure of the Galaxy, on the nature of the Local Group and the account (with the late Carla Kahn) of the Einstein-de Sitter correspondence.
[9] Kahn died of a heart attack in Bourne End, Buckinghamshire, on 8 February 1998 and was buried in the Jewish cemetery in south Manchester.