Fourteen Weeks in Descriptive Astronomy |
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Page 18
... revolve about it in circular orbits ; that the earth revolves daily on its axis , and yearly around the sun ; that Venus is both morning and evening star ; that the planets are inhabited - and he even attempted to calculate the size of ...
... revolve about it in circular orbits ; that the earth revolves daily on its axis , and yearly around the sun ; that Venus is both morning and evening star ; that the planets are inhabited - and he even attempted to calculate the size of ...
Page 19
... revolve around the earth . The planets are placed in one globe , but have a power of moving themselves , under the guidance - as Aristotle taught -of a tutelary genius , who resides in each , and rules over it as the mind rules over the ...
... revolve around the earth . The planets are placed in one globe , but have a power of moving themselves , under the guidance - as Aristotle taught -of a tutelary genius , who resides in each , and rules over it as the mind rules over the ...
Page 23
... revolve the earth and all the planets . He noticed how constantly , when we are riding swiftly , we forget our own motion , and think that the trees and fences are gliding by us in * Ple ' - ya - dez . the contrary direction . He ...
... revolve the earth and all the planets . He noticed how constantly , when we are riding swiftly , we forget our own motion , and think that the trees and fences are gliding by us in * Ple ' - ya - dez . the contrary direction . He ...
Page 24
... revolve about it daily in circular orbits . Brahé was a noble- man of wealth , and , in addition , received large sums from the Government . He erected a magnificent observatory , and made many beautiful and rare in- struments . Clad in ...
... revolve about it daily in circular orbits . Brahé was a noble- man of wealth , and , in addition , received large sums from the Government . He erected a magnificent observatory , and made many beautiful and rare in- struments . Clad in ...
Page 27
... REVOLVE IN ELLIPSES , WITH THE SUN AT ONE FOCUS . Second Law . - Kepler knew that the planets do not move with equal velocity in the different parts of their orbits . He next set about establish- ing some law by which this speed could ...
... REVOLVE IN ELLIPSES , WITH THE SUN AT ONE FOCUS . Second Law . - Kepler knew that the planets do not move with equal velocity in the different parts of their orbits . He next set about establish- ing some law by which this speed could ...
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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...