Author: Rick Williams

  • Equinox

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    Rick Williams
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    On the Equinoxes, the sun rises (almost) directly in the East and sets (almost) directly in the West everywhere on Earth, except the poles. * The Equinox occurs at the moment when the celestial equator of the earth — the plane of the equator — intersects the center of the sun as the sun makes…

  • Declination Lines

    Declination Lines

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    Rick Williams
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    This picture was taken October 23, 2023. The Zodiac sign Scorpio begins this year on October 23rd, so the shadow is on the declination line dividing Libra (green) and Scorpio (blue). The gnomon shadow will track along this line all day. Time on the hour is read on the right side of the figure 8…