A Short History of Astronomy

acceleration accuracy Almagest angle appears Aristotle astronomical attraction axis Bradley Bradley's bright calculation catalogue celestial bodies celestial sphere centre century B.C. chapter circle comet Coppernicus deduced direction discovery distance double star earth eccentricity eclipse epicycle equator error estimate explained fact fixed stars Galilei gravitation Greek Greek astronomy hence Herschel Hipparchus idea important inequalities instruments irregularities Jupiter Jupiter's Kepler known Lagrange Laplace later less light longitude lunar theory Mars mathematical mathematicians measured Mercury method minor planets modern month moon moon's moving nearly nebulae Newton nutation observations Observatory orbit parallax path period 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 period solar system spherical sun and moon sun's tables telescope tion transit of Venus treatise Tycho Tycho Brahe Venus visible