History of Astronomy |
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Page ix
... earth , of the directions of a moving object , Mars - to deduce the exact shape of the path of each of these planets , and their actual positions on these paths at any time . Kepler's masterpiece is one of the most interesting books ...
... earth , of the directions of a moving object , Mars - to deduce the exact shape of the path of each of these planets , and their actual positions on these paths at any time . Kepler's masterpiece is one of the most interesting books ...
Page 5
... earth's equator to the plane of her orbit ( the obliquity of the ecliptic ) has been diminishing slowly since prehistoric times ; and this fact has been confirmed by Egyptian and Chinese observations on the length of the shadow of a ...
... earth's equator to the plane of her orbit ( the obliquity of the ecliptic ) has been diminishing slowly since prehistoric times ; and this fact has been confirmed by Egyptian and Chinese observations on the length of the shadow of a ...
Page 6
... earth to be spherical , and to ascribe the diurnal motions to its rotation . Probably the greatest step ever made in astronomical theory was the placing of the sun , moon , and planets at different distances from the earth instead of ...
... earth to be spherical , and to ascribe the diurnal motions to its rotation . Probably the greatest step ever made in astronomical theory was the placing of the sun , moon , and planets at different distances from the earth instead of ...
Page 13
... earth cuts off the sun's light from her . He supposed the earth to be flat , and to float upon water . He determined the ratio of THE GEOMETRICAL PERIOD 13 Ancient Greek AstronoMY - -
... earth cuts off the sun's light from her . He supposed the earth to be flat , and to float upon water . He determined the ratio of THE GEOMETRICAL PERIOD 13 Ancient Greek AstronoMY - -
Page 14
... earth to be a sphere . Pythagoras ( 569-470 B.C. ) visited Egypt to study . science . He deduced his system , in which the earth revolves in an orbit , from fantastic first principles , of which the following are examples : " The ...
... earth to be a sphere . Pythagoras ( 569-470 B.C. ) visited Egypt to study . science . He deduced his system , in which the earth revolves in an orbit , from fantastic first principles , of which the following are examples : " The ...
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accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later LIBRARIES light lunar Mars mass mathematical mean measured method miles moon moon's motion move Newton noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed SIGILLUM solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY VERITAS