Big Blue

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Big Blue Cousins

• Armillary Spheres by Roger Bailey
• PowerPoint Demonstration
• Text Options
• WordArt Options
• Drawings
• Pictures
• Spreadsheets
• Special Effects

2
Big Blue Cousins

• Armillary Spheres by Roger Bailey
• PowerPoint Demonstration
• Text Options
• WordArt Options
• Drawings
• Pictures
• Spreadsheets
• Special Effects

Walking Shadow Designs
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Kukulcan Equinox Shadows
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What is an Armillary Sphere?

• Sundial ?
• Astronomical instrument?
• Analogue computer?
• Navigation tool?
• Horoscope calculator?
• Model of the Universe?
• Symbol of science, technology and the universe?

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North Pole
Latitude
Hipparchus Equatorial Ring and Equinox Shadow
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The Dark Ages

• Vandals sack Rome, Alexandria etc
• Greek/Roman civilization collapses
• Warlords dominate feudal life
• Science moves east with Moslems and Hindus
• Technology stalled in Europe for over 1000 years

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Declination Error Analysis

• Armillary assumes circular orbits vs elliptical.
  Error?
• Estimate is reasonable compared to commonly used
  equations
• Greatest error (0.7) at equinox when rate of
  change is greatest (0.4/day)
• Date of equinox is critical

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Armillary Sphere and Polar Sundials

• Flatten the equatorial ring in the plane of the
  polar axis
• Distance r Tan t

t
r
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Astronomical Alignment of Big
Horn Medicine Wheel
John Eddy found cairns aligned to Summer
Solstice - Sunrise E-O - Sunset C-O Heliacal
Risings - Aldebaran (June) - Rigel (July) -
Sirius (August) - Formalhaut (May)
J A Eddy, Science 1974
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Heliacal Rising Markers at Big Horn Medicine Wheel
Sirius August
Rigel July
Equinox
Solstice June
Aldebaran June
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Lifes but a Walking Shadow W. Shakespeare
Macbeth Act5 - 5

• To-morrow and to-morrow and to-morrow,
  Creeps in this petty pace from day to day
  To the last syllable of recorded time,
  And all our yesterdays have lighted
  fools The way to dusty death. Out,out
  brief candle! Lifes but a walking shadow, a
  poor player That struts and frets his hour
  upon the stage And is heard no more it is
  a tale Told by an idiot,
  full of sound and fury, Signifying nothing.

Walking Shadow Designs