Complete Essays, Literary Criticism, Cryptography, Autography, Translations & Letters. Эдгар Аллан По

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СКАЧАТЬ or coalescences of atom with atom, being subject to almost infinite variations of time, degree, and condition, on account of the excessive multiplicity of relation, arising from the differences of form assumed as characterizing the atoms at the moment of their quitting the Particle Proper; as well as from the subsequent particular inequidistance, each from each.

      What I wish to impress upon the reader is the certainty of there arising, at once (on withdrawal of the diffusive force, or Divine Volition), out of the condition of the atoms as described, at innumerable points throughout the Universal sphere, innumerable agglomerations, characterized by innumerable specific differences of form, size, essential nature, and distance each from each. The development of Repulsion (Electricity) must have commenced, of course, with the very earliest particular efforts at Unity, and must have proceeded constantly in the ratio of Coalescence — that is to say, in that of Condensation, or, again, of Heterogeneity. Thus the two Principles Proper, Attraction and Repulsion — the Material and the Spiritual — accompany each other, in the strictest fellowship, forever. Thus The Body and The Soul walk hand in hand.

      If now, in fancy, we select any one of the agglomerations considered as in their primary stages throughout the Universal sphere, and suppose this incipient agglomeration to be taking place at that point where the centre of our Sun exists — or rather where it did exist originally; for the Sun is perpetually shifting his position — we shall find ourselves met, and borne onward for a time at least, by the most magnificent of theories, by the Nebular Cosmogony of Laplace; although “Cosmogony” is far too comprehensive a term for what he really discusses — which is the constitution of our solar system alone — of one among the myriad of similar systems which make up the Universe of Stars.

      Confining himself to an obviously limited region — that of our solar system with its comparatively immediate vicinity; and merely assuming — that is to say, assuming without any basis whatever — much of what I have been just endeavoring to place upon a more stable basis than assumption; assuming, for example, matter as diffused (without pretending to account for the diffusion) throughout, and somewhat beyond, the space occupied by our system — diffused in a state of heterogeneous nebulosity and obedient to that omniprevalent law of Gravity at whose principle he ventured to make no guess; assuming all this (which is quite true, although he had no logical right to its assumption), Laplace has shown, dynamically and mathematically, that the results in such case necessarily ensuing are those, and those alone, which we find manifested in the actually existing condition of the system itself.

      To explain:— Let us conceive that particular agglomeration of which we have just spoken — the one at the point designated by our Sun’s centre — to have so far proceeded that a vast quantity of nebulous matter has here assumed a roughly globular form; its centre being, of course, coincident with what is now, or rather was originally, the centre of our Sun; and its surface extending out beyond the orbit of Neptune, the most remote of our planets; in other words, let us suppose the diameter of this rough sphere to be some six thousand millions of miles. For ages, this mass of matter has been undergoing condensation, until at length it has become reduced into the bulk we imagine; having proceeded gradually, of course, from its atomic and imperceptible state, into what we understand of appreciable nebulosity.

      Now, the condition of this mass implies a rotation about an imaginary axis; a rotation which, commencing with the absolute incipiency of the aggregation, has been ever since acquiring velocity. The very first two atoms which met, approaching each other from points not diametrically opposite, would, in rushing partially past each other, form a nucleus for the rotary movement described. How this would increase in velocity, is readily seen. The two atoms are joined by others; — an aggregation is formed. The mass continues to rotate while condensing. But any atom at the circumference has, of course, a more rapid motion than one nearer the centre. The outer atom, however, with its superior velocity, approaches the centre; carrying this superior velocity with it as it goes. Thus every atom, proceeding inwardly, and finally attaching itself to the condensed centre, adds something to the original velocity of that centre — that is to say, increases the rotary movement of the mass.

      Let us now suppose this mass so far condensed that it occupies precisely the space circumscribed by the orbit of Neptune, and that the velocity with which the surface of the mass moves, in the general rotation, is precisely that velocity with which Neptune now revolves about the Sun. At this epoch, then, we are to understand that the constantly increasing centrifugal force, having gotten the better of the non-increasing centripetal, loosened and separated the exterior and least condensed stratum, or a few of the exterior and least condensed strata, at the equator of the sphere, where the tangential velocity predominated; so that these strata formed about the main body an independent ring encircling the equatorial regions; just as the exterior portion thrown off, by excessive velocity of rotation, from a grindstone, would form a ring about the grindstone, but for the solidity of the superficial material — were this caoutchouc, or anything similar in consistency, precisely the phenomenon I describe would be presented.

      The ring thus whirled from the nebulous mass revolved, of course, as a separate ring, with just that velocity with which, while the surface of the mass, it rotated. In the mean time, condensation still proceeding, the interval between the discharged ring and the main body continued to increase, until the former was left at a vast distance from the latter.

Now, admitting the ring to have possessed, by some seemingly accidental arrangement of its heterogeneous materials, a constitution nearly uniform, then this ring, as such, would never have ceased revolving about its primary; but, as might have been anticipated, there appears to have been enough irregularity in the disposition of the materials, to make them cluster about centres of superior solidity; and thus the annular form was destroyed.8 No doubt, the band was soon broken up into several portions, and one of these portions, predominating in mass, absorbed the others into itself; the whole settling, spherically, into a planet. That this latter, as a planet, continued the revolutionary movement which characterized it while a ring, is sufficiently clear; and that it took upon itself, also, an additional movement in its new condition of sphere, is readily explained. The ring being understood as yet unbroken, we see that its exterior, while the whole revolves about the parent body, moves more rapidly than its interior. When the rupture occurred, then, some portion in each fragment must have been moving with greater velocity than the others. The superior movement prevailing, must have whirled each fragment round — that is to say, have caused it to rotate; and the direction of the rotation must, of course, have been the direction of the revolution whence it arose. All the fragments, having become subject to the rotation described, must, in coalescing, have imparted it to the one planet constituted by their coalescence. This planet was Neptune. Its material continuing to undergo condensation, and the centrifugal force, generated in its rotation, getting at length the better of the centripetal, as before in the case of the parent orb, a ring was whirled also from the equatorial surface of this planet; this ring, having been uniform in its constitution, was broken up, and its several fragments, being absorbed by the most massive, were collectively spherified into a moon. Subsequently, the operation was repeated, and a second moon was the result. We thus account for the planet Neptune, with the two satellites which accompany him.9

      In throwing of a ring from its equator, the Sun re-established that equilibrium between its centripetal and centrifugal forces which had been disturbed in the process of condensation; but, as this condensation still proceeded, the equilibrium was again immediately disturbed, through the increase of rotation. By the time the mass had so far shrunk that it occupied a spherical space just that circumscribed by the orbit of Uranus, we are to understand that the centrifugal force had so far obtained the ascendency that new relief was needed; a second equatorial band was, consequently, thrown off, which, proving un-uniform, was broken up, as before in the case of Neptune; the fragments settling into the planet Uranus — the velocity of whose actual revolution about the Sun indicates, of course, the rotary speed of that СКАЧАТЬ