ocr: HELIOCENTRIC WORLD VIEW GRAVITATION AND THE INFINITE UNIVERSE The English physicist, Isaac Newton's (1643 - 1727) gravitation was the definitive solution to the problem of planetary movements. Because Newton could not observe parallax in the stars he concluded that they must be tremendously far away. But if they were NVewfon was a professor of SO distant, they could not reflect the mathematics at Cambridge Sun's light and must theretore be University. luminous themselves, just like our Sun. PHILOSOPHLE In 1687 Newton published his main work, NATURALIS PRINCIPIA Principia', which presented the ...
