Malcolm Sim Longair FRS is a Scottish physicist. He was the Jacksonian Professor of Natural Philosophy in the Cavendish Laboratory, Cambridge University, from 1991 to 2008. His primary research interests are in the fields of high energy astrophysics and astrophysical cosmology. He has written eight books and many articles on this work. His most recent publication is the second edition of his Theoretical Concepts in Physics, released in December 2003. Read more