Epitome of Copernican Astronomy: & Harmonies of the WorldPromethus Books, 1995 - 245 síður The brilliant German mathematician Johannes Kepler (1571-1630), one of the founders of modern astronomy, revolutionized the Copernican heliocentric theory of the universe with his three laws of motion: that the planets move not in circular but elliptical orbits, that their speed is greatest when nearest the sun, and that the sun and planets form an integrated system. This volume contains two of his most important works: The Epitome of Copernican Astronomy (books 4 and 5 of which are translated here) is a textbook of Copernican science, remarkable for the prominence given to physical astronomy and for the extension to the Jovian system of the laws recently discovered to regulate the motions of the Planets. Harmonies of the World (book 5 of which is translated here) expounds an elaborate system of celestial harmonies depending on the varying velocities of the planets. |
Efni
TO THE READER | 5 |
BODIES OF THE WORLD | 121 |
On the Measure of Time or of | 139 |
Höfundarréttur | |
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Accordingly additosubtraction altitude angle aphelial movement aphelion approximately apsides apsis arc PK astronomy Axiom axis Book Brahe cause celestial centre concerning concord consonances converging movements Copernicus cube deflection demonstrated diameter diesis distance diurnal dodecahedron eccentric circle ecliptic ellipse equal equant extreme movements figures fixed stars geometrical globe greater harmonic ratios heavens icosahedron intervals irregularity Jupiter latitude less libration light longitude lunar magnitude mean anomaly mean movement measure ment minor minor sixth mode moon motor virtue movable bodies move movement of Jupiter movement of Mars movement of Saturn movement of Venus nevertheless node octahedron octave orbit perfect perfect fifth perfect fourth perihelial movement perihelion planetary body primary planets private ratio Proposition reason region regular solids revolution revolve rotation Saturn and Jupiter semicircle semidiameter semitone sine single planets solar body sphere square syzygies terrestrial body tetrahedron things threads triangle Tycho Brahe Wherefore