A Short History of Astronomy

accuracy Almagest angle appears apse line Aristarchus Aristarchus of Samos Aristotle astronomical attraction axis Bradley Bradley's calculation catalogue celestial bodies celestial sphere centre century B.C. chapter circle comet Coppernicus deduced direction discovery distance earth eccentric eclipse epicycle equator equinoctial points equinoxes error estimate explained fact fixed stars Galilei geometrical gravitation Greek Greek astronomy hence Herschel Hipparchus horizon idea important inequalities instruments irregularities Jupiter Jupiter's Kepler known Lagrange Laplace less longitude lunar theory Mars mathematical mathematician measured Mercury method minor planets modern months moon moon's moving nearly Newton nutation observations observatory orbit parallax path period planets pole position precession Principia probably problem Ptolemy Ptolemy's published radius recognised regarded Regiomontanus represented result revolution revolving round rotation round the sun satellites Saturn scientific seen shewed shewn sidereal sidereal periods solar system spherical sun and moon sun's tables telescope tion treatise Tycho Tycho Brahe Venus