This Electronic Book, written by Dr. Martin V. Zombeck of the Smithsonian Astrophysical Observatory, covers such diverse areas as spherical astronomy, cosmology, stars, and stellar systems. It's designed for anyone with an interest in quantitative astronomy.
Beginners get in-depth definitions and explanations of any quantity being calculated.
Expert astronomers can skip directly to a variety of useful calculations. For example, you can change your data from the Equatorial to the Horizon coordinate system and Mathcad will automatically calculate the corresponding Horizon coordinates. Quarter using live Mathcad documents.