Collection of astronomy and astrophysics theses collected by Hugh Van Horn. Several were written by students advised by Van Horn. Authors include: Steven Allen Africk (Brown University); France Allard (Heidelberg University); Pierre Brassard (University of Montreal); Alain Beauchamp (University of Montreal); Pierre Bergeron (University of Montreal); Paul Bradley (University of Texas at Austin); Timothy James Bradford Collins (University of Rochester); Jean Dupuis (University of Montreal); Gilles Fontaine (University of Rochester); Thomas C. Grenfell (University of Washington ); Einar H. Gudmundsson (Nordisk Institut for Theoretisk Atmofysik - NORDITA); Bradley Miles Stougaard Hansen (California Institute of Technology); Tamara Toby Helfer (University of Maryland); Stylianos Petros Kapranidis (University of Washington); Steven Daniel Kawaler (University of Texas at Austin); Kepler De Souza Oliveira Filho [S.O. Kepler] (University of Texas at Austin); M. C. Koen (University of Cape Town); Theodoros Koupelis (University of Rochester); Donald Quincy Lamb, Jr. (University of Rochester); Jonathan I. Lunine (University of Rochester); J. Andrew Markiel (University of Rochester); Patrick Neal McDermott (University of Rochester); John Thomas McGraw (University of Rochester); Michael Houston Montgomery (University of Texas at Austin); David Owen Muchmore (University of Washington); Philip David Nicholson (California Institute of Technology); Michael Sean O'Brien (Iowa State University); Claude Pelletier (University of Montreal); Angela Putney (California Institute of Technology); Martin Brian Richardson (State University of New York at Albany); Didier Saumon (University of Rochester); Henry Longfellow Shipman (California Institute of Technology); Sheridan Alan Simon (University of Rochester); Tod E. Strohmayer (University of Rochester); Mary Ann Sweeny (Columbia University); Peter Andrea Thejll (University of Delaware); Hugh Moody Van Horn (Cornell University); Ethan T. Vishniac (University of Rochester); Gary Alan Wegner (University of Washington); Charles Edward Wendell (University of Rochester); Francois Wesemael (University of Rochester); Matthew Alan Wood (University of Texas at Austin). Topics discussed include: white dwarf stars, neutron stars, helium stars, galaxies, atmospheres, pulsars, and solar evolution.