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Through most of 1603, Kepler paused his other work to focus on optical theory ; the resulting manuscript, presented to the emperor on January 1, 1604, was published as Astronomiae Pars Optica ( The Optical Part of Astronomy ).

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Through most of 1603, Kepler paused his other work to focus on optical theory ; the resulting manuscript, presented to the emperor on January 1, 1604, was published as Astronomiae Pars Optica ( The Optical Part of Astronomy ).

Edit
Promote Demote Fragment Fix

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