Giordano Bruno Quotes on Astronomy
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To a body of infinite size there can be ascribed neither centre nor boundary... Thus the Earth no more than any other world is at the centre.
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It is then unnecessary to investigate whether there be beyond the heaven Space, Void or Time. For there is a single general space, a single vast immensity which we may freely call Void; in it are innumerable globes like this one on which we live and grow. This space we declare to be infinite, since neither reason, convenience, possibility, sense-perception nor nature assign to it a limit. In it are an infinity of worlds of the same kind as our own.
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Make then your forecasts, my lords Astrologers, with your slavish physicians, by means of those astrolabes with which you seek to discern the fantastic nine moving spheres; in these you finally imprison your own minds, so that you appear to me but as parrots in a cage, while I watch you dancing up and down, turning and hopping within those circles.
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Bruno - one of the greatest and bravest of men - greatest of all martyrs - perished at the stake, because he insisted on the existence of other worlds and taught the astronomy of Galileo...