Page:The Gradual Acceptance of the Copernican Theory of the Universe.djvu/46

 of the Copernican system. Complete and final proof was adding in the succeeding years by Roemer's (1644-1710) discovery of the velocity of light, by Bradley's (1693-1762) study of its aberration, by Bessel's discovery of stellar parallax in 1838, and by Foucault's experimental demonstration of the earth's axial motion with a pendulum in 1851.

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