History of Astronomy |
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Page viii
... explain the invariable humility of the great mathe- matical astronomers . Newton's comparison of himself to the child on the seashore applies to them all . As each new discovery opens up , it may be , boundless oceans for investigation ...
... explain the invariable humility of the great mathe- matical astronomers . Newton's comparison of himself to the child on the seashore applies to them all . As each new discovery opens up , it may be , boundless oceans for investigation ...
Page 6
... explain how the sun , having set in the west , could get back to rise in the east without being seen if it was always the same It was a great step to suppose the earth to be spherical , and to ascribe the diurnal motions to its rotation ...
... explain how the sun , having set in the west , could get back to rise in the east without being seen if it was always the same It was a great step to suppose the earth to be spherical , and to ascribe the diurnal motions to its rotation ...
Page 13
... explains her phases ; that an eclipse of the moon happens when the 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 THE MOON AND ...
... explains her phases ; that an eclipse of the moon happens when the 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 THE MOON AND ...
Page 14
... explained the return of the sun to the east each morning by its going under the flat earth in the night . He held that in a solar eclipse the moon hides the sun , and in a lunar eclipse the moon enters the earth's shadow - both ...
... explained the return of the sun to the east each morning by its going under the flat earth in the night . He held that in a solar eclipse the moon hides the sun , and in a lunar eclipse the moon enters the earth's shadow - both ...
Page 16
... explain how the earth is supported , just as were those who invented the myth of Atlas , or the Indians with the tortoise . Thales thought that the flat earth floated on water . Anaxagoras thought that , being flat , it would be buoyed ...
... explain how the earth is supported , just as were those who invented the myth of Atlas , or the Indians with the tortoise . Thales thought that the flat earth floated on water . Anaxagoras thought that , being flat , it would be buoyed ...
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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