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III.  the celestial sphere

  1. introduction
  2. coordinate systems
    1. the horizontal coordinate system
    2. the equatorial coordinate system
    3. the ecliptic coordinate system
    4. the galactic coordinate system
  3. timekeeping systems
    1. sidereal time
    2. solar time
    3. universal time
    4. the calendar
  4. example problems



©Vik Dhillon, 30th September 2009