The Scientific Library; Or, Repository of Useful and Polite Literature: Comprising Astronomy, Geography, Mythology, Ancient History, Modern History, and Chronology ...S. Wood & Sons, 1818 |
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Página 7
... seven of them have been distinguish- ed by astronomers with the following charac- ters and appellations : the Mercury ; Venus ; the Earth ; Mars ; Jupiter : h Saturn ; Georgium Sidus , or Herschel . MERCURY , the nearest planet to the ...
... seven of them have been distinguish- ed by astronomers with the following charac- ters and appellations : the Mercury ; Venus ; the Earth ; Mars ; Jupiter : h Saturn ; Georgium Sidus , or Herschel . MERCURY , the nearest planet to the ...
Página 10
... Seven moons or satellites re- volve round the equator of this planet , and he is also encircled by a luminous ring , which has occasioned many conjectures among the lovers of astronomy ; some supposing this singular appearance to be ...
... Seven moons or satellites re- volve round the equator of this planet , and he is also encircled by a luminous ring , which has occasioned many conjectures among the lovers of astronomy ; some supposing this singular appearance to be ...
Página 12
... seven months , and ten days . HERCULES , recently discovered by Dr. Olbers , is three times the size of Jupiter , and performs its revolution round the sun in twó hundred and eleven years ; being 8,047,000,000 of miles from that ...
... seven months , and ten days . HERCULES , recently discovered by Dr. Olbers , is three times the size of Jupiter , and performs its revolution round the sun in twó hundred and eleven years ; being 8,047,000,000 of miles from that ...
Página 31
... seven days , supposed to have been derived from the tradition , of the creation of the world . This measure however , was not universally adopt- ed ; for the week of the ancient Greeks is said to have consisted of ten days , and that of ...
... seven days , supposed to have been derived from the tradition , of the creation of the world . This measure however , was not universally adopt- ed ; for the week of the ancient Greeks is said to have consisted of ten days , and that of ...
Página 61
... seven days , seven hours , forty - three minutes , and four seconds , moving at the rate of about two thou- sand two hundred and ninety miles an hour.- The diameter of the moon is two thousand , one hundred , and eighty miles , and her ...
... seven days , seven hours , forty - three minutes , and four seconds , moving at the rate of about two thou- sand two hundred and ninety miles an hour.- The diameter of the moon is two thousand , one hundred , and eighty miles , and her ...
Términos y frases comunes
aberration of light altitude annual revolution apparent motion appear Aries ascer ascertain astronomers called cause celestial centre circle comets computed consequently course darkness days and nights degree 15 degree 30 diameter discovered distance diurnal motion diurnal rotation divide Dominical letter earth earth's shadow east eastern side epact equa equal equator equinoctial equinox exactly extends from degree fixed stars full moon golden number gree half happen heavenly bodies heavens horizon isphere Julius Cæsar latitude less Libra light longitude luminary lunar lunar eclipses magni millions of miles minutes month moon's orbit nodes noon north or south north pole northern occasioned opposite parallel passes between degree phere planets Principal star quadrant Rectify the globe refraction satellites seasons second magnitude shadow falls situated solar eclipse south pole southern hemis southern hemisphere southern side sun and moon sun-dial sun's place supposed tides time-piece tion tude turn twelve western young readers
Pasajes populares
Página 13 - Amid the radiant orbs, That more than deck, that animate the sky, The life-infusing suns of other worlds ; Lo ! from the dread immensity of space Returning, with accelerated course, The rushing comet to the Sun descends ; And as he sinks below the shading earth, With awful train projected o'er the Heavens, The guilty nations tremble.
Página 100 - For I perceived that, if Light was propagated in Time, the apparent Place of a fixed Object would not be the same when ' the Eye is at Rest, as when it is moving in any other Direction, than that of the Line passing through the Eye and the Object ; and that, when the Eye is moving in different Directions, the apparent Place of the Object would be different.
Página 99 - March, 1726, the star was found to be 20" more southwardly than at the time of the first observation. It now, indeed, seemed to have arrived at its utmost limit southward, because, in several trials made about this time, no sensible difference was observed in its situation. By the middle of April it appeared to be returning back again towards the north ; and about the beginning of June it passed at the same distance from the zenith as it had done in December when it was first observed. From the quick...
Página 100 - For I perceived that, if light was propagated in time, the apparent place of a fixed object would not be the same when the eye is at rest, as when it is moving in any other direction than that of the line passing through the eye and...
Página 79 - Eclipses of the sun are more frequent than those of the moon, because his ecliptic limits are greater ; and yet we have more visible eclipses of the moon than of the sun, which is owing to their being seen from all parts of the earth where the moon is above the horizon when the eclipse happens ; whilst those of the sun can only be observed on that small portion of the hemisphere, on which the moon's shadow falls. The greatest number of eclipses, of both luminaries, which can happen in a year, is...
Página 99 - I then endeavoured to find out the cause of them. I was already convinced that the apparent motion of the stars was not owing to a nutation of the earth's axis. The next thing that offered itself was an alteration in the direction of the plumb-line, with which the instrument was constantly rectified; but this upon trial proved insufficient. Then I considered what refraction might do; but here also nothing satisfactory occurred.
Página 26 - ... if the earth's axis were perpendicular to the plane of its orbit, and the excessive variation which would result if the axis were nearly parallel to that plane.