[en] This journal contains 7 articles pertaining to astrophysics. The first article is an overview of the other 6 articles and also a tribute to Jim Wilson and his work in the fields of general relativity and numerical astrophysics. The six articles are on the following subjects: (1) computer simulations of black hole accretion; (2) calculations on the collapse of the iron core of a massive star; (3) stellar-collapse models which reveal a possible site for nucleosynthesis of elements heavier than iron; (4) modeling sources for gravitational radiation; (5) the development of a computer program for finite-difference mesh calculations and its applications to astrophysics; (6) the existence of neutrinos with nonzero rest mass are used to explain the universe. Abstracts of each of the articles were prepared separately. (SC)