History of Astronomy |
From inside the book
Results 1-5 of 27
Page vii
... measured by the increased habit of looking at facts from new points of view , as much as by the accumulation of facts . The mental capacity of one age does not seem to differ from that of other ages ; but it is the imagination of new ...
... measured by the increased habit of looking at facts from new points of view , as much as by the accumulation of facts . The mental capacity of one age does not seem to differ from that of other ages ; but it is the imagination of new ...
Page 18
... measured the inclination to the equator of the sun's apparent path in the heavens— i.e. , he measured the obliquity of the ecliptic , making it 23 ° 51 ' , confirming our knowledge of its continuous diminution during historical times ...
... measured the inclination to the equator of the sun's apparent path in the heavens— i.e. , he measured the obliquity of the ecliptic , making it 23 ° 51 ' , confirming our knowledge of its continuous diminution during historical times ...
Page 19
... measurements , and so discovered the acceleration of the moon's mean motion . This was conclusively estab- lished , but could not be explained by the Newtonian theory for quite a long time . ] He determined the plane of the moon's orbit ...
... measurements , and so discovered the acceleration of the moon's mean motion . This was conclusively estab- lished , but could not be explained by the Newtonian theory for quite a long time . ] He determined the plane of the moon's orbit ...
Page 36
George Forbes. and many of his position - measurements were made by measuring the angular distances from known stars . Taking into consideration the absence of either a telescope or a clock , and reading his account of the labour he ...
George Forbes. and many of his position - measurements were made by measuring the angular distances from known stars . Taking into consideration the absence of either a telescope or a clock , and reading his account of the labour he ...
Page 50
... measured with considerable accuracy the acceleration at that date of Jupiter's mean motion , and indicated the retardation of Saturn's mean motion . Horrocks ' investigations , so far as they could be collected , were published ...
... measured with considerable accuracy the acceleration at that date of Jupiter's mean motion , and indicated the retardation of Saturn's mean motion . Horrocks ' investigations , so far as they could be collected , were published ...
Other editions - View all
Common terms and phrases
accurate observations Airy astro Astronomer Royal Astronomia Nova astronomical units attraction axis bright calculations Cape Cassini catalogue centre century comet compute Copernicus diameter discovered discovery earth eclipse epicycles equatoreal error excentric explain fact fixed stars Galileo Greenwich Halley heavenly bodies heavens heliometer Hipparchus Huggins hydrogen hypothesis instruments Johann Kepler John Herschel Jupiter Jupiter's Kepler Laplace Lick Observatory light line of apses line of sight lunar Mars mathematical mean distance mean motion measured Mercury meteor method miles a second moon moon's nebulæ Newton Observatory orbit parallax perihelion period photographic physical planet planetary pole position predicted proper motion proved Ptolemy R. S. Phil records refractor retrograde retrograde motion revolution revolve round ring rotation round the sun satellites seems showed Sirius solar system spectra spectroscope spectrum spots stellar sun-spots sun's surface supposed tables telescope theory tion Trans Tycho Brahe Uranus velocity Venus Verrier zenith