AstronomyASTRONOMYReading editionChapter navigation67 reading sectionsGo to chapterChoose a chapter…Front matterASTRONOMYDAVID TODDPREFACEChapter I · ASTRONOMY A LIVING SCIENCEChapter II · THE FIRST ASTRONOMERSChapter III · PYRAMID, TOMB, AND TEMPLEChapter IV · ORIGIN OF GREEK ASTRONOMYChapter V · MEASURING THE EARTH—ERATOSTHENESChapter VI · PTOLEMY AND HIS GREAT BOOKChapter VII · ASTRONOMY OF THE MIDDLE AGESChapter VIII · COPERNICUS AND THE NEW ERAChapter IX · TYCHO, THE GREAT OBSERVERChapter X · KEPLER, THE GREAT CALCULATORChapter XI · GALILEO, THE GREAT EXPERIMENTERChapter XII · AFTER THE GREAT MASTERSChapter XIII · NEWTON AND MOTIONChapter XIV · NEWTON AND GRAVITATIONChapter XV · AFTER NEWTONChapter XVI · HALLEY AND HIS COMETChapter XVII · BRADLEY AND ABERRATIONChapter XVIII · THE TELESCOPEChapter XIX · REFLECTORS—MIRROR TELESCOPESChapter XX · THE STORY OF THE SPECTROSCOPEChapter XXI · THE STORY OF ASTRONOMICAL PHOTOGRAPHYChapter XXII · MOUNTAIN OBSERVATORIESChapter XXIII · THE PROGRAM OF A GREAT OBSERVATORYChapter XXIV · OUR SOLAR SYSTEMChapter XXV · THE SUN AND OBSERVING ITChapter XXVI · SUN SPOTS AND PROMINENCESChapter XXVII · THE INNER PLANETSChapter XXVIII · THE MOON AND HER SURFACEChapter XXIX · ECLIPSES OF THE MOONChapter XXX · TOTAL ECLIPSES OF THE SUNChapter XXXI · THE SOLAR CORONAChapter XXXII · THE RUDDY PLANETChapter XXXIII · THE CANALS OF MARSChapter XXXIV · LIFE IN OTHER WORLDSChapter XXXV · THE LITTLE PLANETSChapter XXXVI · THE GIANT PLANETChapter XXXVII · THE RINGED PLANETChapter XXXVIII · THE FARTHEST PLANETSChapter XXXIX · THE TRANS-NEPTUNIAN PLANETChapter XL · COMETS—THE HAIRY STARSChapter XLI · WHERE DO COMETS COME FROM?Chapter XLII · METEORS AND SHOOTING STARSRADIANT POINTChapter XLIII · METEORITESChapter XLIV · THE UNIVERSE OF STARSChapter XLV · STAR CHARTS AND CATALOGUESChapter XLVI · THE SUN'S MOTION TOWARD LYRAChapter XLVII · STARS AND THEIR SPECTRAL TYPEChapter XLVIII · STAR DISTANCESChapter XLIX · THE NEAREST STARSChapter L · ACTUAL DIMENSIONS OF THE STARSChapter LI · THE VARIABLE STARSChapter LII · THE NOVÆ, OR NEW STARSChapter LIII · THE DOUBLE STARSChapter LIV · THE STAR CLUSTERSChapter LV · MOVING CLUSTERSChapter LVI · THE TWO STAR STREAMSChapter LVII · THE GALAXY OR MILKY WAYChapter LVIII · STAR CLOUDS AND NEBULÆChapter LIX · THE SPIRAL NEBULÆChapter LX · COSMOGONYChapter LXI · COSMOGONY IN TRANSITIONTranscriber's Notes:Previous chapter ←Front matterNext chapter →DAVID TODDAll chapters and sections (67)Opening pagesFront matterOther sectionsASTRONOMYDAVID TODDPREFACEChapters123456789101112131415161718192021222324252627282930313233343536373839404142Other sectionsRADIANT POINTChapters43444546474849505152535455565758596061Other sectionsTranscriber's Notes:The Science of the Heavenly Bodies◇BY◇← Front matterDAVID TODD →