Popular Astronomy, And, The Orbs of HeavenG. Routledge and Sons, 1860 |
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Página 8
... exact centre of the circle in which the sun travelled round the heavens . By profound study , Hipparchus discovered that all the facts could be explained by giving to the earth a position , not in the centre of the sun's orbit , but ...
... exact centre of the circle in which the sun travelled round the heavens . By profound study , Hipparchus discovered that all the facts could be explained by giving to the earth a position , not in the centre of the sun's orbit , but ...
Página 13
... a general outline of the curves they de- scribed ; and as these curves , as determined by observation , approximated the circular form , it was concluded that the deviations from that exact figure were only errors of obser- THE SUN . 13.
... a general outline of the curves they de- scribed ; and as these curves , as determined by observation , approximated the circular form , it was concluded that the deviations from that exact figure were only errors of obser- THE SUN . 13.
Página 15
... exact solution of this grand problem . THE SOLAR PARALLAX . - In case an observer were located at the sun's centre , and from his eye two visual rays were drawn , one to the centre of the earth , the other tangent tc the spherical ...
... exact solution of this grand problem . THE SOLAR PARALLAX . - In case an observer were located at the sun's centre , and from his eye two visual rays were drawn , one to the centre of the earth , the other tangent tc the spherical ...
Página 18
... exact knowledge of the relative velocity of Venus across the solar disc . Α B { B B If we note , then , exactly the moment the planet is in contact with the solar disc at p , and also at p ' , this interval of time will give an enlarged ...
... exact knowledge of the relative velocity of Venus across the solar disc . Α B { B B If we note , then , exactly the moment the planet is in contact with the solar disc at p , and also at p ' , this interval of time will give an enlarged ...
Página 21
... exact period in which his rotation is performed ; but in consequence of their change of figure , and change of position as well , we can only reach an approximate value of the period of rotation . This is now fixed , by the best ...
... exact period in which his rotation is performed ; but in consequence of their change of figure , and change of position as well , we can only reach an approximate value of the period of rotation . This is now fixed , by the best ...
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Popular Astronomy, And, the Orbs of Heaven Denison Olmsted,Ormsby MacKnight Mitchel Sin vista previa disponible - 2015 |
Términos y frases comunes
absolute actually angle aphelion appear astronomer attraction axis celestial celestial sphere centre centrifugal force circle circular clock comet commenced computed Copernicus curve determined diameter direction disc discovered discovery earth earth's orbit eccentricity ecliptic entire equal equator exact examination existence fact fall figure fixed stars force Galileo grand Halley's comet heavenly bodies heavens hence Herschel Hipparchus hypothesis inclination increase instrument investigation John Herschel Jupiter Kepler laws of Kepler light longitude magnitude Mars mass mean distance measure Mercury meridian miles mind minute moon moon's orbit motion move movements nearly Newton object observation observatory parallax pass perihelion period of revolution phenomena planet planetary orbits pole position precisely present problem Ptolemy reached revolving right ascension ring rotation round satellites Saturn seen sidereal solar system space sphere sun's surface sweeping telescope theory thousand tion truth Uranus velocity Venus vernal equinox visible
Pasajes populares
Página 220 - ... night, and month and year, till youth shall wear away, and middle age is gone, and the extremest limit of human life has been attained ; count every pulse, and at each speed on your way a hundred thousand miles ; and when a hundred years have rolled by, look out, and behold ! the thronging millions of blazing suns are still around you, each separated from the other by such a distance that in this journey of a century you have only left half a score behind you.
Página 194 - Then the man sighed, and stopped, and shuddered, and wept. His overladen heart uttered itself in tears; and he said, " Angel, I will go no farther; for the spirit of man acheth with this infinity.
Página 221 - What is man, that thou art mindful of him? and the son of man, that thou visitest him? For thou hast made him a little lower than the angels, and hast crowned him with glory and honour. Thou madest him to have dominion over the works of thy hands ; thou hast put all things under his feet...
Página 151 - we calculated from morning till night, sometimes even at meals ; the consequence of which was, that I contracted an illness which changed my constitution .during the remainder of my life. The assistance rendered by Madame Lepaute was such, that without her we never should have dared to undertake the enormous...
Página 194 - And from all the listening stars that shone around issued a choral voice, " The man speaks truly ; end there is none that ever yet we heard of ! " " End is there none ? " the angel solemnly demanded ; " Is there indeed no end ? And is this the sorrow that kills you ? " But no voice answered, that he might answer himself. Then the angel threw up his glorious hands to the heaven of heavens saying, " End is there none to the universe of God.
Página 34 - ... closer, until, reaching forward with piercing intellectual vigor, he at last finds a new moon which occurs precisely at the computed time of her passage across the sun's track. Here he makes his stand, and on the day of the occurrence of that new moon he announces to the startled inhabitants of the world that the sun shall expire in dark eclipse.
Página 220 - ... outward from object to object, from universe to universe, remember that the light from those filmy stains on the deep pure blue of heaven, now falling on your eye, has been traversing space for a million of years. Would you gather some knowledge of the omnipotence of God? weigh the earth on which we dwell, then count the millions of its inhabitants that have come and gone for the last six thousand years. Unite their strength into one arm, and test its power in an effort to move this earth. It...
Página 265 - Scriptures), that the sun is the centre of the world, and that it does not move from east to west, and that the earth does move, and is not the centre of the world...
Página 1 - In this boundless field of investigation, human genius has won its most signal victories. Generation after generation has rolled away, age after age has swept silently by; but each has swelled, by its contributions, the stream of discovery.
Página 194 - End is there none?" the angel solemnly demanded: " Is there indeed no end ? And is this the sorrow that kills you ? " But no voice answered, that he might answer himself. Then the angel threw up his glorious hands to the heaven of heavens ; saying, " End is there none to the universe of God ? Lo ! also there is no Beginning.