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Matthias Hornof
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Astronomy
Kishore S Kumar
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Introductory Astronomy : Absolue Magn…
Wolfe Wall
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Copia de Le ciel à votre latitude
Francesc Piazuelo
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Eric Dennison
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Nathaniel Cunningham
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Xander Lau
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Keith Harrison
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Ed von Schleck
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Sete Cordas
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The last 50 Million years of planet E…
Ed von Schleck
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Brahmagupta's Theorem
John Golden
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For Debating "Flat Earthers"
JimSmithInChiapas
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Cópia de Brahmagupta's Theorem
Geraldo Ferreira da Silva Filho
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