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With the view of showing that if the Nebular Hypothesis be true, the genesis of the solar system supplies one illustration of this law, let us assume that the matter of which the sun and planets consist was once in a diffused form; and that from the gravitation of its atoms there resulted a gradual concentration.
The Nebular Theory was proved and worked out by Kant more than a hundred and thirty years ago. In 1799 Laplace worked it out again; but it was a long time before it was accepted. And now we go back to Kant and Laplace for our demonstration. Darwin's "Origin of Species" was published in 1859. But it was attacked by scientists as well as theologians on every hand.
The process of condensation being in its essentials the same for all concentrating nebular spheroids, planetary or solar, it was argued that the Sun is still passing through that incandescent stage which all the planets have long ago passed through: his later aggregation, joined with the immensely greater ratio of his mass to his surface, involving comparative lateness of cooling.
Whatever the nature of these diffused stretches of matter may be, then, the name applies fitly to them, and any theory of the development of a star from them is still a "nebular hypothesis." But the three theories which divide astronomers to-day differ as to the nature of the nebula.
But even were the Nebular Hypothesis admitted, and were the Theory of Development by Natural Laws conceived to afford a satisfactory explanation of the origin of the planetary systems, it would not follow, as a necessary consequence, that the peculiar evidence of Theism that on which it mainly depends, and to which it makes its most confident appeal would be thereby destroyed, or even diminished.
We can scarcely doubt that this law of commensurability has largely influenced the present distribution of the asteroids. But its effects must have been produced while they were still in an unformed, perhaps a nebular condition.
At the period where the question is taken up in Laplace's treatment of the nebular theory, the shape of this mass is regarded as spheroidal; but at an earlier period its shape may well have been as irregular as that of any of the nebulae which we now see in distant parts of the heavens, for, whatever its primitive shape, the equalization of its rotation would in time make it spheroidal.
Beginning with virtually the same notion of the original condition of our world and sun cluster, the new view departs widely as to the processes by which the planets were formed, and extends much further with respect to the first condition and ultimate destiny of our earth. The New Astronomy, like the old, begins with a nebular hypothesis.
The universe, according to this now fashionable nebular theory, began as a single vast ocean of matter of immense tenuity, spread all alike over all space as far as nowhere, and comparatively little different within itself when looked at side by side with its own final historical outcome. In Mr.
So Hegel fell far behind Kant in this respect for the latter had already by his nebular hypothesis proclaimed the origin and, by his discovery of the stoppage of the rotation of the earth through the tides, the destruction of the solar system. And finally, I could not undertake to construct the dialectical laws of nature but to discover them in it and to develop them from it.
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