GEK1506 Heavenly Mathematics & Cultural Astronomy, Tutorial 1

1. How does the Earth move around the Sun. What is the direction of the rotation and the revolution? What is the obliquity? What is the eccentricity? What is the ecliptic plane?
2. What is the midnight Sun? Where and when can you see it?
3. Define the following concepts.
   • North Pole and South Pole
   • North Celestial Pole and South Celestial Pole
   • North point
   • Equator
   • Celestial equator
   • Latitude and longitude
   • Circles (or parallels) of latitude
   • Meridians
   • Prime Meridian
   • (Celestial) Meridian
   • Great circles
   • Arctic Circle, Tropic of Cancer, Tropic of Capricorn and Antarctic Circle
   • Tropics, North (South) Temperate Zone, Arctic and Antarctic
   • Horizon
   • Summer (June) and winter (December) solstices and spring (March) and autumnal (September) equinoxes
4. How do we know that the Earth is round?

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