This book investigates the question of how matter has evolved since its
origin in the Big Bang, from the cosmological synthesis of hydrogen and
helium to the generation of the complex set of nuclei that comprise our
world and our selves. A central theme is the evolution of
gravitationally contained thermonuclear reactors, otherwise known as
stars. Our current understanding is presented systematically and
quantitatively, by combining simple analytic models with new
state-of-the-art computer simulations. The narrative begins with the
clues (primarily the solar system abundance pattern), the constraining
physics (primarily nuclear and particle physics), and the thermonuclear
burning in the Big Bang itself. It continues with a step-by-step
description of how stars evolve by nuclear reactions, a critical
investigation of supernova explosion mechanisms and the formation of
neutron stars and of black holes, and an analysis of how such explosions
appear to astronomers (illustrated by comparison with recent
observations). It concludes with a synthesis of these ideas for galactic
evolution, with implications for nucleosynthesis in the first generation
of stars and for the solar system abundance pattern. Emphasis is given
to questions that remain open, and to active research areas that bridge
the disciplines of astronomy, cosmochemistry, physics, and planetary and
space science. Extensive references are given.