 | John Henry Pratt - 1836 - 672 lapas
...coincide with the orbit calculations must be made for an ellipse or hyperbola. It is thus found that " three or four comets describe very long ellipses:...There is reason to think that two or three comets move in hyperbolas." (Airy's Gravitation, page 15.) 272. Our calculations have been hitherto respecting... | |
 | T H. Howe - 1842 - 458 lapas
...courses around the sun, describe Ellipses of very little excentricity, of which the sun is a focus. " Three or four comets describe very long Ellipses,...comets, which have been observed, move in Hyperbolas. " Every thing that is said respecting the motion of a planet, or body of any kind, round the sun, in... | |
 | John Henry Pratt - 1842 - 674 lapas
...coincide with the orbit calculations must be made for an ellipse or hyperbola. It is thus found that " three or four comets describe very long ellipses:...curves which cannot be distinguished from parabolas. Thereis reason to think that two or three comets move in hyperbolas." (Airy^s Gravitation, page 15.)... | |
 | 1867 - 522 lapas
...pina s and H will be the two focuses.) Fig. S. If the body describe a parabola or hyperbola, the srm is in the focus. (19.) The planets describe ellipses...two or three comets which have been observed move iu hyperbolas. But as we do not propose, in this treatise, to enter into a discussion on the motions... | |
 | Elias Loomis - 1866 - 384 lapas
...the sun is in the focus. The planets describe ellipses which differ little from circles. A few of the comets describe very long ellipses ; and nearly all...have been observed are found to move in curves which can not be distinguished from parabolas. There is reason to think that two or three comets which have... | |
 | Charles Knight - 1867 - 526 lapas
...two focuses.) Fig. 3. If the body describe a parabola or hyperbola, the sun is in the focus. (1!).') The planets describe ellipses which are very little...the others that have been observed are found to move hi curves which cannot be distinguished from parabolas. There is reason to think that two or three... | |
 | Elias Loomis - 1870 - 398 lapas
...the sun is in the focus. The planets describe ellipses which differ little from circles. A few of the comets describe very long ellipses ; and nearly all...have been observed are found to move in curves which can not be distinguished from parabolas. There is reason to think that two or three comets which have... | |
 | Alfred Hix Welsh - 1883 - 326 lapas
...an ellipse, of which the sun, as an attractive force, occupies onc of the foci. Most of the comets are found to move in curves which cannot be distinguished from parabolas; und several are supposed to move in hyperbolas. These curves were first studied in the school of Plato,... | |
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The planets describe ellipses which are very little flattened, and differ very little from circles. Three or four comets describe very long ellipses : and nearly all the others that have been observed are found to move in curves which cannot be distinguished... 