Since the publication of the popular first edition, stellar and planetary scientists have produced numerous new observations, theories, and interpretations, including the "demotion" of our former ninth planet Pluto as a dwarf planet. Covering all of these new discoveries, this second edition explains the science associated with the planets, the stars they orbit, and the interactions between them. Along with more problems, this edition adds new material and improves analytical treatments. To help with solving the problems, Fortran programs are provided on the book's CRC Press web page.