GEK1506 Heavenly Mathematics & Cultural Astronomy, Tutorial 1, Solutions

  1. See the notes.
  2. In the Arctic and Antarctic regions. From March equinox to September equinox at the North Pole, from September equinox to March equinox at the South Pole, at June solstice on the Arctic Circle, at December solstice at the Antarctic Circle.
  3. There are infinitely many meridians on the Earth. The one through Greenwich is called the prime meridian. There's only one meridian in the sky.
  4. Use the applet.

Helmer Aslaksen
Department of Mathematics
National University of Singapore

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