Etudes sur l'origine des météores cosmiques et la formation de leurs courantsCommission, Voss' Sortiment (G. Haessel), Leipzig, 1903 - 364 páginas A collection of articles, corrected and updated, previously published in various journals. |
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Página 223 - ... and thus scattering them. What that added force must be, we cannot very well tell, because it differs according to the place in the orbit where the disintegration takes place. If that disintegration takes place near the sun, it is one thing; if it takes place near Jupiter, it is another. It looks more to me as though there was a disintegration all along the line of the comet's orbit, giving us small particles with all sorts of loads of electricity and all sorts of differences of central attraction...
Página 26 - Denza écrit (MM vol. 46, pp. 78 — 79): nJe mis tous mes soins à déterminer exclusivement la position du radiant, ce qui ne présentait aucune difficulté. Voilà de quelle manière je m'y pris. Je fixai attentivement sa position approximative et ensuite je traçai sur le papier le chemin de quelques uns de ces météores qui se détachaint autour de ce point.
Página 24 - Par rapport au radiant des Andromédides, du 27 novembre 1885, M. Denning fait l'observation suivante (MN vol. 46, pp. 68 — 71): „The radiant point was at 26"-н44°, but the observed tracks did not come precisely to focus. It was necessary to adopt a radiant area of several degrees diameter in order to satisfay the directions... The area of radiation must have been fully 7° in diameter to accomodate the discordances in the flights".
Página 48 - Meunier s'exprime ainsi: nSi la communauté d'origine des deux ordres de météores, même supposée réelle, ne se traduit par aucune circonstance constatable, il ne reste aucun motif de l'admettre. La plupart des astronomes qui discutent ces questions n'ont pas étudié en détail la structure des divers types de roches cosmiques. Les conditions extraordinairement complexes que suppose, par exemple, la constitution du célèbre fer de Pallas, sont absolument incompatibles avec la supposition d'une...
Página 223 - ... planets in their orbits. I see no escape, myself, from this conclusion. What it means, I must leave to you to decide. Our experiments make it very improbable that the attraction of matter differs in any way from proportion to the mass. It looks to me as though the more natural explanation is that, in some way, the materials which go off from the comet carry with them a load of electricity, or something of that kind, by which they have a permanent repulsion or permanent attraction sufficient to...
Página 21 - Denning's own observations, reduced from 2,170 meteors in 1876-7, give an average of 22 days. In Dr. Schmidt's Catalogue there are 45 meteor showers with duration of about 30 days or more. In my own Catalogue, reduced from 2,000 meteors seen in England 1849-1867, the average duration for 40 showers for the whole year is 33 days (omitting 12 showers over 54 days, some of which are doubtless not really one shower). I think we may therefore take it for granted, until at least proved to be incorrect,...
Página 230 - Chandler's discussion of the orbits of these companions establishes the important proposition that the force wnich led to the separation of the components A and C, whatever its nature, operated in the plane of the comet's orbit, and produced no change in that plane or in the form of the conic section, but only in its size, and in the direction of its major axis.
Página 25 - Biela swarm, the elliptic shape of the area above referred to would probably be missed by observers who combincd tracks laid down with an interval of three or four hours. For, owing to the axial rotation of the Earth, the centre of radiation would appear to shift rapidly in heavens in a direction nearly at right angles to the longer axis of the observed ellipse. Thus, by...
Página 22 - ... approximately in the same orbit in nearly the same periodic time. It is evident that we can have no knowledge whatever except of those streams that actually intersect the orbit of the Earth. There is a special case in which the Earth can remain in a stream for several weeks with a nearly fixed radiant. The orbit must nearly coincide with the plane of the ecliptic, the perihelion distance of the central portion be a little less than unity, and the motion be direct. The position of the radiant...
Página 22 - ... well known, about August 10, but it is perhaps not equally well known that this shower feebly commences about July 24 and continues until about August 17, ending much more suddenly than it commences. The Leonids...