Hand-books of Natural Philosophy and Astronomy, Volume 3Blanchard and Lea, 1854 - Astronomy |
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Common terms and phrases
altitude apparent magnitudes apparent motion appear ascertained atmosphere attraction axis bodies called causes celestial equator celestial pole celestial sphere centre centrifugal force circle clouds condensation conductor congelation degree density depth dew point direction disk distance diurnal diurnal motion earth effect electricity elevation ellipticity equal equatorial explained extreme fall feet firmament fluid globe greater greatest heat heavens hemisphere horizon hygrometer inches increase inferior conjunction inferior planet instrument intersection interval latitude length less light line of collimation lunar lunar phases mass mean temperature meridian miles moon moon's mountain move 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 sphere star strata stratum superficial surface synodic period take place telescope temperature terrestrial thermal thermometer tion tube vapour variation varies velocity visible weight wires zenith zone
Popular passages
Page 120 - This interval is divided, like a common day, into 24 hours, each hour into 60 minutes, and each minute into 60 seconds. Since...
Page 230 - Thames than otherwise, and does not give so much water, while the ebb tide runs out late, and marks lower; but upon the gales abating and weather moderating, the tides put in and rise much higher, while they also run longer before high water is marked, and with more velocity of current: nor do they run out so long or so low.
Page 174 - ... one from north to south, and the other from east to west. The direction of this compound effect would, by the principles of the composition of motion (M.
Page 213 - 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.
Page 310 - A vacant place In the planetary series. — At a very early epoch in the progress of astronomy it was observed that the progression of the distances of the planets from the sun was characterised by a remarkable numerical harmony, in which nevertheless a breach of continuity existed between Mars and Jupiter. This arithmetical progression was first loosely noticed by Kepler, but it was not until towards the close of the last century, that the more exact conditions of the law and the close degree of...
Page 387 - Its axis is inclined to the plane of its orbit at an angle of 23° 2/ 12.68".
Page 726 - ... 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 ?
Page 361 - June, the planet presented an appearance, fig. 1., closely resembling that of Jupiter, except that a dark streak was seen along its equator, produced by the shadow of the ring, the earth being then a little above the common plane of the ring and the sun. A few feeble streaks, of a greyish colour, were visible on each hemisphere, which however disappeared towards the poles. A very feeble star was seen at the western extremity of the ring, which was supposed to be one of the nearer satellites. The...
Page 234 - Thus, to form a globe like the sun it would be necessary to foil nearly fourteen hundred thousand globes like the earth into one. It is found, by considering the bulks of the different planets, that if all the planets and satellites in the solar system were moulded into a single globe, that globe would still not exceed the five-hundredth part...
Page 468 - Although this clear perception of causes and consequences characterizes the whole domain of physical science, and clothes the natural philosopher with powers denied to the political and moral inquirer, yet foreknowledge is eminently the privilege of the astronomer. Nature has raised the curtain of futurity, and displayed before him the succession of her decrees, so far as they affect the physical universe, for countless ages to come; and the revelations of which she has made him the instrument, are...