Positional Astronomy

  1. Introduction

  2. The Terrestrial Sphere

  3. Spherical Trigonometry

  4. Coordinate Systems: the horizontal or "alt-az" system

  5. Coordinate systems: the first equatorial or "HA-dec." system

  6. Coordinate systems: the second equatorial or "RA-dec." system

  7. Sidereal Time

  8. Conversion between horizontal and equatorial systems

  9. Galactic coordinates

  10. Ecliptic coordinates

  11. Equatorial and ecliptic coordinates

  12. The Sun's motion, and its effect on time-keeping

  13. The Moon

  14. Refraction

  15. Sunrise, sunset and twilight

  16. Geocentric or diurnal parallax

  17. Annual parallax

  18. Aberration

  19. Precession

  20. Calendars

  21. Exercise