History of Astronomy |
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Page 14
... revolve round the sun , which itself revolves round an imaginary central fire called the Antichthon . Copernicus in the sixteenth century claimed Pythagoras as the founder of the system which he , Copernicus , revived . Anaxagoras ...
... revolve round the sun , which itself revolves round an imaginary central fire called the Antichthon . Copernicus in the sixteenth century claimed Pythagoras as the founder of the system which he , Copernicus , revived . Anaxagoras ...
Page 16
... revolve on its axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary ... circular movement of the heavens , as water is stationary in a pail when whirled round by a string . Democritus ...
... revolve on its axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary ... circular movement of the heavens , as water is stationary in a pail when whirled round by a string . Democritus ...
Page 22
... revolves round the sun once in a year , can understand that the apparent motion of a planet is only its motion relative to the earth . If , then , we suppose the earth fixed and the sun to revolve round it once a year , and the planets ...
... revolves round the sun once in a year , can understand that the apparent motion of a planet is only its motion relative to the earth . If , then , we suppose the earth fixed and the sun to revolve round it once a year , and the planets ...
Page 25
... revolve round the sun , and to be carried with him in his annual motion round the earth . He noticed that the same supposition , if extended to Mars , Jupiter , and Saturn , would explain easily why they , and especially Mars , seem so ...
... revolve round the sun , and to be carried with him in his annual motion round the earth . He noticed that the same supposition , if extended to Mars , Jupiter , and Saturn , would explain easily why they , and especially Mars , seem so ...
Page 56
... revolve in a curve which may be any one of the sections of a cone - a circle , ellipse , parabola , or hyperbola ; and he found that those comets of which he had observations move in parabolæ round the Sun , and are thus subject to the ...
... revolve in a curve which may be any one of the sections of a cone - a circle , ellipse , parabola , or hyperbola ; and he found that those comets of which he had observations move in parabolæ round the Sun , and are thus subject to 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