pt. 1. Introduction: Chapters 1-6 -- 1. Naked eye observations -- 2. Ancient world models -- 3. Observations made by instruments -- 4. The nature of the observables -- 5. The astronomer's measurements -- 6. The night sky -- pt. 2. The Celestial Sphere and Elementary Celestial Mechanics: Chapters 7-14 -- 7. The geometry of the sphere -- 8. The celestial sphere: coordinate systems -- 9. The celestial sphere: timekeeping systems -- 10. The reduction of positional observations: I -- 11. The reduction of positional observations: II -- 12. Geocentric planetary phenomena -- 13. Celestial mechanics: the two-body problem -- 14. Celestial mechanics: the many-body problem -- pt. 3. Observational techniques: Chapters 15-23 -- 15. The radiation laws -- 16. The optics of telescope collectors -- 17. Visual use of telescopes -- 18. Detectors for optical telescopes -- 19. Astronomical optical measurements -- 20. Modern telescopes and other optical systems -- 21. Radio telescopes -- 22. Telescope mountings -- 23. High energy instruments and other detectors -- pt. 4. Experimental Work: Chapter 24 -- 24. Practical projects -- App. Astronomical and related constants.