Fourteen Weeks in Descriptive Astronomy |
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Page 33
... miles from the surface of the earth , or eight thousand miles from the centre . Then , as it is twice as far from the centre , its weight will be diminished 22 , or 4 times . If it were placed 3 , 4 , 5 , 10 times further away , its ...
... miles from the surface of the earth , or eight thousand miles from the centre . Then , as it is twice as far from the centre , its weight will be diminished 22 , or 4 times . If it were placed 3 , 4 , 5 , 10 times further away , its ...
Page 35
... miles , and the two lines will seem to unite : so we must consider this great earth as a mere speck or point at the ... miles apart , yet they would be extended so far that we could not separate them , and they would appear to pierce the ...
... miles , and the two lines will seem to unite : so we must consider this great earth as a mere speck or point at the ... miles apart , yet they would be extended so far that we could not separate them , and they would appear to pierce the ...
Page 36
... miles further away , or at the very centre of the earth , where our view would be bounded by a great circle of the earth . On the con- cave surface of the celestial sphere there are imag- ined to be drawn three systems of circles : the ...
... miles further away , or at the very centre of the earth , where our view would be bounded by a great circle of the earth . On the con- cave surface of the celestial sphere there are imag- ined to be drawn three systems of circles : the ...
Page 46
... miles . Since the orbit of the earth is elliptical , and the sun is situated at one of its foci , the earth is nearly 3,000,000 miles further from the sun in aphelion than in perihelion . As we attempt to locate the heavenly bodies in ...
... miles . Since the orbit of the earth is elliptical , and the sun is situated at one of its foci , the earth is nearly 3,000,000 miles further from the sun in aphelion than in perihelion . As we attempt to locate the heavenly bodies in ...
Page 47
... miles an hour , would require 341 years to reach its desti- nation . Ten generations would be born and would die ; the young men would become gray - haired , and their great - grandchildren would forget the story of the beginning of ...
... miles an hour , would require 341 years to reach its desti- nation . Ten generations would be born and would die ; the young men would become gray - haired , and their great - grandchildren would forget the story of the beginning of ...
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Common terms and phrases
ancients Andromeda angle aphelion appearance Aries astronomer atmosphere axis beautiful Boötes bright brilliant Canis Minor Capricornus Cassiopeia celestial centre Cepheus circle color comet constellation Cor Caroli dark density Describe diameter disk double stars earth east ecliptic equal equator equinoctial figure fixed stars globe heat heavens Hercules Herschel horizon inferior inferior conjunction inferior planet Jupiter latitude length light longitude luminous lunar Lyra Mars mean distance measured Mercury meridian meteors miles moon moon's motion move Mythological naked eye named nebula Neptune night node north pole orbit Orion pass path perihelion Perseus Pisces planet Polaris rays revolve ring Saturn seasons seen shine sidereal sidereal day Sirius small stars solar day solar system solstice space sphere spots summer sun's surface synodic revolution tail tance Taurus telescope theory tion triangle Uranus Ursa Major Ursa Minor vary velocity Venus vernal equinox visible winter zodiac
Popular passages
Page 6 - One God, one law, one element, And one far-off divine event, To which the whole creation moves.
Page 129 - ... while the Earth remaineth seed-time and harvest, and cold and heat, and summer and winter, and day and night shall not cease.
Page 251 - Back comes the Chief in triumph. Who, in the hour of fight, Hath seen the Great Twin Brethren In harness on his right. Safe comes the ship to haven, Through billows and through gales, If once the Great Twin Brethren Sit shining on the sails.
Page 289 - A solar day is the interval between two successive passages of the sun across the meridian of any place.
Page 192 - We see it as Columbus saw America from the shores of Spain. Its movements have been felt, trembling along the far-reaching line of our analysis, with a certainty hardly inferior to that of ocular demonstration.
Page 29 - If you forgive me, I rejoice ; if you are angry, I can bear it. The die is cast, the book is written, to be read either now or by posterity, I care not which. It may well wait a century for a reader, as God has waited six thousand years for an observer.
Page 251 - Orion is represented under the figure of a hunter assaulting Taurus. He has a sword in his belt, a club in his right hand, and the skin of a lion in his left.
Page 31 - Nature, such as the seven metals, &,c., which it were tedious to enumerate, we gather that the number of planets is necessarily seven. Moreover, the satellites are invisible to the naked eye, and therefore can exercise no influence over the earth, and therefore would be useless, and therefore do not exist.
Page 119 - ... of September. On this day it slowly sweeps around the sky, with its face half hidden below the icy sea. It still continues to descend ; and, after it has entirely disappeared, it is still so near the horizon that it carries a bright twilight around the heavens in its daily circuit. As the sun sinks lower and lower, this twilight grows gradually fainter till it fades away.
Page 99 - Sadler, the celebrated aeronaut, ascended on one occasion in a balloon from Dublin, and was wafted across the Irish Channel, when, on his approach to the Welsh coast, the balloon descended nearly to the surface of the sea. By this time the sun was set, and the shades of evening began to close in. He threw out nearly all his ballast, and suddenly sprang upward to a great height, and by so doing brought his horizon to dip below the sun, producing the whole phenomenon of a western sunrise. Subsequently...