Hand-books of Natural Philosophy and Astronomy, Volumen3Blanchard and Lea, 1854 |
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Términos y frases comunes
altitude angle apparent diameter apparent magnitudes apparent motion appear ascertained atmosphere attraction axis bodies bulb causes celestial equator celestial pole celestial sphere centre circle clouds condensation conductor congelation degree density depth determine dew point direction disk distance diurnal diurnal motion earth ecliptic effects electricity elevation ellipticity equal ether explained extreme fall feet firmament fluid globe greater greatest hailstones heat heavens hemisphere hoar frost horizon hygrometer inches increase inferior inferior conjunction inferior planet instrument interval latitude length less light line of collimation lunar magnitude mass mean temperature meridian miles moon object observed orbit parallax pass phenomena planet PLATE polar pole position produced quantity radiation rays regions right ascension rise rotation round saturated seen snow-line solar sometimes sphere star strata stratum superficial surface suspended synodic period takes place telescope temperature terrestrial thermal thermometer tion tube variation varies visible weight wires zenith zone
Pasajes populares
Página 360 - ... rings. Supposing them mathematically perfect in their circular form, and exactly concentric with the planet, it is demonstrable that they would form (in spite of their centrifugal force) a system in a state of unstable equilibrium, which the slightest external power would subvert — not by causing a rupture in the substance of the rings — but by precipitating them, unbroken, on the surface of the planet.
Página 707 - So sung The glorious train ascending : He through heaven, That open'd wide her blazing portals, led To God's eternal house direct the way, A broad and ample road, whose dust is gold, And pavement stars...
Página 459 - How favourable to the development of all the best and highest feelings of the soul are such objects ! the only passion they inspire being the love of truth, and the chiefest pleasure of their votaries arising from excursions through the imposing scenery of the universe — scenery on a scale of grandeur and magnificence compared with which whatever we are accustomed to call sublimity on our planet dwindles into ridiculous insignificancy. Most justly has it been said, that nature has implanted in...
Página 210 - Vesuvius and elsewhere ; but with the remarkable peculiarity that the bottoms of many of the craters are very deeply depressed below the general surface of the moon, the internal depth being in many cases two or three times the external height.
Página 377 - Its axis is inclined to the plane of its orbit at an angle of 23° 2/ 12.68".
Página 719 - ... the firmament of large stars, into which the central cluster would be seen projected, and (owing to its greater distance) appearing like it to consist of stars much smaller than those in other parts of the heavens. "Can it be,'' asks Sir J. Herschel, " that we have here a brother system, bearing a real physical resemblance and strong analogy of structure to our own ?
Página 765 - HANDBOOK OF MODERN EUROPEAN LITERATURE : British, Danish, Dutch, French, German, Hungarian, Italian, Polish and Russian, Portuguese, Spanish, and Swedish. With a full Biographical and Chronological Index. By Mrs. FOSTER.
Página 687 - It was then as bright as Sirius, and continued to increase till it surpassed Jupiter when brightest, and was visible at mid-day.
Página 81 - ... that currents of light succeed each other ; and, in fine, that the vast firmament presents one immense and magnificent dome of light, reposing on the snowcovered base supplied by the ground, which itself serves as a dazzling frame for a sea, calm and black as a pitchy lake ; and some idea, though an imperfect one, may be obtained of the splendid spectacle which presents itself to him who witnesses the aurora from the Bay of Alten.
Página 732 - ... tons, the instrument is raised by two men with great facility. Of course it is counterpoised in every direction. The observer when at work, stands in one of four galleries, the three highest of which are drawn out from the western wall, while the fourth, or lowest, has for its base an elevating platform, along the horizontal surface of which a gallery slides from wall to wall, by machinery within the observer's reach, but which a child may work. When the telescope is...