William Lee obteined his P.h. D. In Phisics in The University of Wisconsin, Madison, USA. In 1998 he was incorporated as researcher at the Institute of Astronomy of UNAM, where he has olso served as Director. He has reacently been appointed as Coordinator of Scientific Research of UNAM by the current Rector Dr Enrique Graue Wiechers. His research has been centered in compact objects of the universe, hydrodynamics and astrophisics of high energies. He has made important contributions to the undestranding of cosmologic gamma rays.