^Laboratory Fellows from 1981 to the present Los Alamos National Security J. G. Hills has made large contributions to Laboratory and international programs in astrophysics, interplanet science, and asteroid interdiction. He also is recognized worldwide as one of the major authorities in the field of stellar dynamics and has made seminal contributions to the quantitative understanding of interactions between binary and single stars in clusters.نسخة محفوظة 31 مارس 2019 على موقع واي باك مشين.