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Copernicus born,
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Nicolas Copernicus Publishes De Revolutionibus Orbium Coelestium (On the Revolutions of Celestial Bodies) Copernicus' masterwork; he sets out the heliocentric theory.
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Pope Gregory XIII suggested reform of the Julian calendar, thus leading much of Catholic Europe away from the Julian (Old Style) calendar to the Gregorian
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Thomas Harriot (c.1560-1621) travels to what would be called America and, in his A Briefe and True Report of the New Found Land of Virginia discusses its wonders, among them tobacco.
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Galileo Galilei Demonstrates the Properties of Gravity Galileo demonstrates, from the top of the leaning tower of Pisa
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Galileo Galilei constructs his first telescope and turns it toward the heavens; his instruments begin at magnifications of approximately 3X and 10X, the most powerful achieving a magnification of 30X, an instrument he eventually gave away as a gift
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John Napier Publishes Description of the Marvelous Canon of Logarithms Napier's invention and cataloguing of logarithms is an essential step in easing the task of numerical calculation.
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Francis Bacon Publishes Novum Organum Bacon attempts to create organization and cooperation within the scientific community by demonstrating how the diverse fields of science relate to one another.
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Galileo is Forced to Recant his Theories about everything revovles round the sun
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Isaac Newton Publishes Philosophia Naturalis Principia Mathematica