Edmond Halley

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Edmond Halley

England 1656 – 1742

Comments: Astronomer, 2nd at Greenwich Observatory; computing the orbit of the eponymous Halley's Comet, reappears every 76 years or so; convince Isaac Newton convinced him to write the Philosophiæ Naturalis Principia Mathematica (1687); built a diving bell; hollow Earth theory, a shell about 500 miles thick, two inner concentric shells and an innermost core, about the diameters of the planets Venus, Mars, and Mercury; created life insurance annuities chart; we know now that a " piece of the famous Halley's comet likely slammed into Earth in A.D. 536, blasting so much dust into the atmosphere that the planet cooled" *;

Teachers:Eratosthene; Democritus; Christiaan Huygens; Galileo; John Flamsteed; Tycho Brahe; Johannes Kepler; Edward Bernard; Nicholas Copernicus; Ptolemy;

Students: Marin Mersenne; William Stukeley; Ebenezer Sibly; Joseph Louis Lagrange; Pierre-Simon Laplace; Leon Foucault;

Friends / Enemies /Partners for a while: Gottfried Wilhelm Leibniz; Robert Hooke; Isaac Newton; Johannes Hevelius; Mary Tooke , wife;

Just Enemies: George Psalmanazar, the Savage from the island Formosa;

Organizations: The Royal Society; Royal Greenwich Observatory;

Author: An Estimate of the Degrees of the Mortality of Mankind (1693);Considerations on the Changes of the Latitudes of Some of the Principal Fixed Stars (1718); A Synopsis of the Astronomy of Comets (1715)

Resources: http://en.wikipedia.org/wiki/Edmond_Halley ; * http://www.livescience.com/42048-halleys-comet-linked-to-ancient-famine.html?google_editors_picks=true ; http://www.theatlantic.com/international/archive/2014/04/london-forgotten-aryan-asian-fraudster/361035/ ;