For it is the duty of an astronomer to compose the history of the celestial motions from a careful and skillful study of the observations.
Heliocentric model of the solar system
Preface to 'De Revolutionibus Orbium Coelestium'
1543
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"There may be babblers, wholly ignorant of mathematics, who dare to condemn my hypothesis, upon the authority of some part of the Bible twisted to suit their purpose. I value them not, and scorn their …"
Strange & Unusual"Therefore, I think that the earth is not the center of the universe, but rather the sun."
Controversial"And if the earth were to stand still, the appearance of the heavens would be very different."
Controversial"The earth also is spherical, since it presses upon its center from every direction."
Controversial"For the world is spherical, and is bounded by a spherical surface."
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