Andrew Christopher Fabian OBE FRS^[1][5] (born 20 February 1948) is a British astronomer and astrophysicist. He was Director of the Institute of Astronomy, University of Cambridge from 2013 to 2018. He was a Royal Society Research Professor at the Institute of Astronomy, Cambridge from 1982 to 2013, and Vice-Master of Darwin College, Cambridge from 1997 to 2012. He served as president of the Royal Astronomical Society from May 2008 through to 2010.^[6]

Fabian was educated at King's College London (BSc, Physics) and the Mullard Space Science Laboratory at University College London (PhD).^[7]

Fabian was Gresham Professor of Astronomy at Gresham College, a position in which he delivered free public lectures within the City of London between 1982 and 1984.^[8] He was editor-in-chief of the astronomy journal Monthly Notices of the Royal Astronomical Society from 1994–2008.^[9]

His areas of research include galaxy clusters, active galactic nuclei, strong gravity, black holes and the X-ray background. He has also worked on X-ray binaries, neutron stars and supernova remnants in the past. Much of his research involves X-ray astronomy and high energy astrophysics. His notable achievements include his involvement in the discovery of broad iron lines emitted from active galactic nuclei, for which he was jointly awarded the Bruno Rossi Prize. He is author of over 1000 refereed articles^[10] and head of the X-ray astronomy group at the Institute of Astronomy.^[11]