Joseph Ivor Silk FRS (born 3 December 1942) is a British-American [citation needed] astrophysicist.
[3] Silk has given more than two hundred invited conference lectures, primarily on galaxy formation and cosmology.
Following a career of nearly 30 years there, Silk returned to the UK in 1999 to take up the Savilian Chair of Astronomy at the University of Oxford.
[5] The structure of the cosmic microwave background anisotropies is principally determined by two effects: acoustic oscillations and diffusion damping.
[8] In 2011, Silk delivered a talk, "The Creation of the Universe," at the first Starmus Festival in the Canary Islands.