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Altitude and Azimuth
Keith Harrison
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Equinox Geometry
JimSmithInChiapas
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Kishore S Kumar
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Keith Harrison
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Polaris Elevation on a Flat Earth vs …
Sete Cordas
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Le ciel à votre latitude
Jean David
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For Debating "Flat Earthers"
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Make your own planet, Janet !
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How to do Addition and Subtraction
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Blackbody Spectrum versus Temperature
Wolfe Wall
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Colour Index Versus Temperature
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Eratosthenes' Method
Brendan O'Donoghue
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Time(i) Space Time of " a "
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Epiciclos
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Astronomie : déclinaison
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Analemmas and Sun motion
Denis
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Defining the Space i
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Apparent Magnitude versus Light Flux
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Observing Venus
Victor Hui
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The Zigzag Function
Kishore S Kumar
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Basic Orrery
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Distance from Earth versus Distance M…
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Epicyclic Movement of Superior Planets
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Projection of Lines
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Planetenphasen Teil 1
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Four Dimensions of Space
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