Astronomy, as it is Known at the Present Day: With an Account of the Nature and Use of Astronomical Instruments, the Manner of Calculating the Notes of the Calendar, the Distances and Magnitudes of the Planets, and a Number of Other Useful and Interesting Calculations in AstronomyW. Cole, 1825 - 166 من الصفحات |
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الصفحة 8
... side by the surface of the sphere . 3. The Radius of a Sphere , or Circle , is half the diameter . 4. The Circumference of a Sphere , or Circle , is the line which goes quite round it . 5. A great Circle divides the surface of the ...
... side by the surface of the sphere . 3. The Radius of a Sphere , or Circle , is half the diameter . 4. The Circumference of a Sphere , or Circle , is the line which goes quite round it . 5. A great Circle divides the surface of the ...
الصفحة 9
... side of the equinoctial , and the other on the south . 15. The Obliquity of the Ecliptic is the angle formed by the intersection of the equinoctial and the ecliptic ; at present this angle is 23 ° 27 ′ 46 ′′ ; but it is subject to a ...
... side of the equinoctial , and the other on the south . 15. The Obliquity of the Ecliptic is the angle formed by the intersection of the equinoctial and the ecliptic ; at present this angle is 23 ° 27 ′ 46 ′′ ; but it is subject to a ...
الصفحة 10
... side of the ecliptic , and the other half on the other side ; consequently it must cross the ecliptic in two F * If the two ends of a thread be tied together , and thrown loosely over two pins stuck in a table , as S and F , and if the ...
... side of the ecliptic , and the other half on the other side ; consequently it must cross the ecliptic in two F * If the two ends of a thread be tied together , and thrown loosely over two pins stuck in a table , as S and F , and if the ...
الصفحة 17
... sides . This appearance , he says , may be explained by a gentle and gradual removal of the shining fluid which permits us to see the globe of the sun . The Doctor also says , that on the 26th of August , 1792 , he examined the sun with ...
... sides . This appearance , he says , may be explained by a gentle and gradual removal of the shining fluid which permits us to see the globe of the sun . The Doctor also says , that on the 26th of August , 1792 , he examined the sun with ...
الصفحة 22
... side is never turned directly towards the earth , except when he is so near the sun as to be lost to our sight in his beams . His enlightened side being thus always turned towards the sun , proves that he shines not by any light of his ...
... side is never turned directly towards the earth , except when he is so near the sun as to be lost to our sight in his beams . His enlightened side being thus always turned towards the sun , proves that he shines not by any light of his ...
طبعات أخرى - عرض جميع المقتطفات
Astronomy, as It Is Known at the Present Day <span dir=ltr>George G. Carey</span> لا تتوفر معاينة - 2015 |
عبارات ومصطلحات مألوفة
altitude angle appear ascertained astronomers atmosphere Aurora Borealis axis calculations called centre circle clouds colours Comets constellation degrees density diameter direction disc discovered diurnal motion Dominical letter earth's orbit eccentric anomaly eclipse equal equator equinox fixed stars following figure glass globe gravity greater greatest heat heavenly bodies heavens height Hence Herschel horizon inferior conjunction Julius Cæsar Jupiter known latitude length light longitude luminous lunar magnitude mean distance Mercury meridian miles minutes moon moon's move nearly night object obliquity observed occasioned opposite parallax passing period phenomena philosophers poles produced Ptolemy quantity of matter rainbow rays refraction retrograde motion revolution round revolve right ascension rise round the earth round the sun satellites Saturn seen shadow shines sidereal solar spherical sun and moon sun's supposed surface telescope tides tion Tycho Tychonic systems Uranus velocity Venus visible
مقاطع مشهورة
الصفحة 110 - Sometime we see a cloud that's dragonish ; A vapour sometime like a bear or lion, A tower'd citadel, a pendent rock, A forked mountain, or blue promontory With trees upon't, that nod unto the world, And mock our eyes with air : thou hast seen these signs ; They are black vesper's pageants.
الصفحة 100 - Meantime, refracted from yon eastern cloud, Bestriding earth, the grand ethereal bow Shoots up immense; and every hue unfolds, In fair proportion, running from the red To where the violet fades into the sky.
الصفحة 130 - With light and heat refulgent. Then Thy sun Shoots full perfection through the swelling year: And oft Thy voice in dreadful thunder speaks : And oft...
الصفحة 15 - These are thy glorious works, Parent of good, Almighty ! thine this universal frame, Thus wondrous fair: thyself how wondrous then, Unspeakable ! who sitt'st above these heavens To us invisible, or dimly seen In these thy lowest works; yet these declare Thy goodness beyond thought, and power divine.
الصفحة 23 - Had in her sober livery all things clad; Silence accompanied, for beast and bird, They to their grassy couch, these to their nests, Were slunk, all but the wakeful nightingale; She all night long her amorous descant* sung; Silence was pleased: now...
الصفحة 16 - Hither, as to their fountain, other stars Repairing, in their golden urns draw light...
الصفحة 116 - The rising vapours catch the silver light ; Thence fancy measures, as they parting fly, Which first will throw its shadow on the eye, Passing the source of light ; and thence away, Succeeded quick by brighter still than they.
الصفحة 64 - ... a degree of brightness about as strong as that with which such a coal would be seen to glow in faint daylight.
الصفحة 68 - Next glaring wat'ry thro' the Bull he moves; The am'rous Twins admit his genial ray ; Now burning, thro' the Crab he takes his way ; The Lion flaming, bears the solar power; The Virgin faints beneath the sultry shower. Now the just Balance weighs his equal force, The slimy Serpent swelters in his course; The sabled Archer clouds his languid face ; The Goat, with tempests, urges on his race.
الصفحة 111 - Where, midst the changeful scenery, ever new, Fancy a thousand wondrous forms descries, More wildly great than ever pencil drew, Rocks, torrents, gulfs, and shapes of giant size, And glitt'ring cliffs on cliffs, and fiery ramparts, rise.