For the world is spherical, and is bounded by a spherical surface.
Heliocentric model of the solar system
From 'De Revolutionibus Orbium Coelestium', Book I, Chapter 1
1543
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"I consider it the chief duty of an astronomer to gather the observations of the heavenly bodies, and to explain their motions by hypotheses."
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Strange & Unusual"So that we may not err, we should always follow the footsteps of the ancients."
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