## Kepler’s Physical AstronomySpringer Science & Business Media, 6. des. 2012 - 218 síður Kepler's Physical Astronomy is an account of Kepler's reformulation of astronomy as a physical science, and of his successful use of (incorrect) physics as a guide in his astronomical discoveries. It presents the only reliable account of the internal logic of Kepler's so-called first and second laws, showing how and to what extent Kepler thought he had derived them from his physical principles. It explains for the first time Kepler's attempt to use an obscure discovery of Tycho Brahe to unify and confirm all of his own physical theories. It also describes the intricate (and neglected) theory which Kepler developed to account for the additional anomalies needed for the theory of the moon. |

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angle aphelion approximation apsidal line area law argument Astronomia nova axis body calculations Chapter circular orbit circular sectors circumsolar coequated anomaly component computed conchoid construction Copernican Copernicus deflection delay direction distance law distance theory earth earth's orbit eccentric anomaly eccentric circle ecliptic ellipse epicycle epicyclic model Epitome equal equant center equant model equation of center equivalent error evection explain Figure geometrical heliocentric hence increments inequality Kepler Kepler's physics latitude theory libration theory libratory force longitude lunar theory Mars mathematical mean anomaly mean distances mean sun measured moon moon's moved the planet nodes optical equation oval path perihelion perpendicular physical equation physical theory planet moved planet's distance planetary mind planetary motion planetary theory position precisely problem Ptolemy quadrant radius ratio reason rotation second anomaly simple solar radius solar theory speed sphere sun's sunlight syzygies triangle true anomaly true sun variation velocity versed sine