The World of Comets |
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Page 29
... situated as to form an equilateral triangle or a square with some of the fixed stars , they are addressed to learning and wit . They distribute poison when they appear in the head of either the Northern or the Southern Serpent ...
... situated as to form an equilateral triangle or a square with some of the fixed stars , they are addressed to learning and wit . They distribute poison when they appear in the head of either the Northern or the Southern Serpent ...
Page 47
... describing with care the movements of comets , Apian observ- ing that cometary tails are always turned in a direction from the sun ; Cardan remarking that comets are situated in a region far beyond the moon , founding his opinion upon 47.
... describing with care the movements of comets , Apian observ- ing that cometary tails are always turned in a direction from the sun ; Cardan remarking that comets are situated in a region far beyond the moon , founding his opinion upon 47.
Page 54
... situated upon the northern side of the plane of the ecliptic , from left to right , or from west to east . The move- ment of some comets is direct , and that of others retrograde . This circumstance had great weight in securing the ...
... situated upon the northern side of the plane of the ecliptic , from left to right , or from west to east . The move- ment of some comets is direct , and that of others retrograde . This circumstance had great weight in securing the ...
Page 59
... situated within a very small distance of the pole - star ; the lengths of these arcs depend upon the interval of time between the observations , and the angular distance of each body from the pole . The direction is that of the general ...
... situated within a very small distance of the pole - star ; the lengths of these arcs depend upon the interval of time between the observations , and the angular distance of each body from the pole . The direction is that of the general ...
Page 61
... Situated , like the fixed stars , at immense dis- tances from our system , they had no appreciable movement of their own during the whole time of their visibility - in some instances of considerable duration . The same is true of 61.
... Situated , like the fixed stars , at immense dis- tances from our system , they had no appreciable movement of their own during the whole time of their visibility - in some instances of considerable duration . The same is true of 61.
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Common terms and phrases
according action amongst ancient aphelion apparition Arago astronomers atmosphere axis believe Biela's comet bolides bright bright bands brilliant calculated cause celestial bodies century Coggia's comet cometary orbits cometary tails curve described diameter direction diurnal motion Donati's comet earth eccentricity elliptic orbit Encke Encke's comet Ephorus epoch fact Faye globe gravitation Halley Halley's comet heat heavens hyperbolic hypothesis ideas inclination influence John Herschel July Jupiter Kepler law of Kepler laws less light longitude luminous mass matter mean distance meteors moon motion move movement Myndus nearly nebulosity Newton node November nucleus number of comets observed opinion parabolic orbit passed perihelion distance perihelion passage periodical comets perturbations phenomena physical Pingré planetary planets portion position prediction presage rays regarded region remarkable repulsive force retrograde revolution SECTION seen Seneca solar system space stars supposed telescope theory tion velocity visible whilst Winnecke Yvon Villarceau
Popular passages
Page 479 - We could tell, for example, the number of degrees which this amount of heat would impart to a globe of water equal to the earth in size. Mayer and...
Page 512 - A combustion irresistible, all devouring, omni-prevalent, immediate ; — the entire fulfilment, in all their minute and terrible details, of the fiery and horror-inspiring denunciations of the prophecies of the Holy Book. ' Why need I paint, Charmion, the now disenchained frenzy of mankind ? That tenuity in the comet which had previously inspired us with hope, was now the source of the bitterness of despair. In its impalpable gaseous character we clearly perceived the consummation of Fate. Meantime...
Page 26 - So spake the grisly terror, and in shape, So speaking: and so threatening, grew tenfold More dreadful and deform : on the other side, Incensed with indignation, Satan stood Unterrified, and like a comet burned, That fires the length of Ophiuchus huge In the arctic sky, and from his horrid hair Shakes pestilence and war.
Page 265 - I could only get four comparisons with an anonymous star, it had moved forward 2"~5 in four minutes, and that settled its being the right object. I recorded it as " Circular; bright, with a decided nucleus, but no tail, and about 45
Page 102 - Wherefore if according to what we have already said it should return again about the year 1758, candid posterity will not refuse to acknowledge that this was first discovered by an Englishman.
Page 12 - Seneca also expressed the opinion that some comets portend mischief: ' Some comets,' he said, 'are very cruel and portend the worst misfortunes ; they bring with them and leave behind them the seeds of blood and slaughter.
Page 265 - Just about 17|h. mean time a brief blue space enabled me to find Biela, and though I could only get four comparisons with an anonymous star, it had moved forward 2.5 s.
Page 457 - Je viens vous annoncer une grande nouvelle. Nous l'avons en dormant, Madame, échappé belle : Un monde près de nous a passé tout du long, Est chu tout au travers de notre tourbillon; Et s'il eût en chemin rencontré notre terre, Elle eût été brisée en morceaux comme verre.
Page 349 - When the slit was brought back past the nucleus on to the commencement of the tail, the gaseous spectrum became rapidly fainter, until, at a short distance from the nucleus, the continuous spectrum predominated so strongly that the middle band only, which is the brightest, could be detected on it. We have presented to us, therefore, by the light of the comet three spectra : — 1. The spectrum of bright bands. 2. The continuous spectrum of the nucleus. 3. The continuous spectrum which accompanies...
Page 475 - We see why the animals and plants of the south may have existed in the climates of the north, where their relics and impressions are still to be found. Lastly, it explains the short period of the existence of the moral world, whose earliest monuments do not go much farther back than three thousand years.