Galactic Astronomy (often shortened to ) is a graduate‑level textbook that has become a standard reference for anyone studying the structure, dynamics, and stellar populations of the Milky Way and external galaxies. First published in 1998 (first edition) and updated in 2008 (second edition) by James Binney (Oxford) and Michael Merrifield (Cambridge), the text blends observational facts with theoretical frameworks, making it a bridge between “pure” astronomy and “galactic dynamics”. binney merrifield galactic astronomy pdf patched