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.
  4. How do we know that the Earth is round?

Helmer Aslaksen
Department of Mathematics
National University of Singapore

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