- The white circle represents the celestial sphere and the green
circle represents the ground. The sun or a star make a round
of yellow circle in a day.
- If you want to see the rough scketch of the curve in north pole in summer, set "Latitude of observatory = 90 degrees" and "Latitude of the star = 25". Then press "Animation" button. You will see a circle.
- If you want to see the rough scketch of the curve in Tokyo in summer, set "Latitude of observatory = 35 degrees" and "Latitude of the star = 25". Then press "Animation" button. You will see a hyperbola.
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