GEK1506 Heavenly Mathematics & Cultural Astronomy, Tutorial 5

  1. Why is the vernal equinox both a time and a place?
  2. How many different definitions can you give of equinox and solstices?
  3. What is the “Age of Aquarius”?
  4. Why is the Tropic of Cancer called the Tropic of Cancer even though the Sun is not in Cancer in late June?
  5. What do you need to know to know the maximal altitude of the Sun on a given day? Give a formula that determines the maximal altitude of the Sun on a given day.
  6. How long does the Sun lag behind the stars every day?
  7. How long does the Moon lag behind the Sun every day?

Helmer Aslaksen
Department of Mathematics
National University of Singapore
helmer.aslaksen@gmail.com