Galileo Galilei Quotes About Astronomy
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To command their professors of astronomy to refute their own observations is to command them not to see what they do see and not to understand what they do understand.
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In my studies of astronomy and philosophy I hold this opinion about the universe, that the Sun remains fixed in the centre of the circle of heavenly bodies, without changing its place; and the Earth, turning upon itself, moves round the Sun.
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Philosophy [nature] is written in that great book which ever is before our eyes -- I mean the universe -- but we cannot understand it if we do not first learn the language and grasp the symbols in which it is written. The book is written in mathematical language, and the symbols are triangles, circles and other geometrical figures, without whose help it is impossible to comprehend a single word of it; without which one wanders in vain through a dark labyrinth.
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In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.
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