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Updated: June 16, 2025
Our belief in the universality of the law of gravitation would, in fact, have been seriously challenged unless some explanation of the lunar acceleration had been forthcoming. For about fifty years no one questioned the truth of Laplace's investigation.
In great part, of course, this difficulty arises from the very nature of the subject, and is so far unavoidable. No one need attempt to read the "Mecanique Celeste" who has not been naturally endowed with considerable mathematical aptitude which he has cultivated by years of assiduous study. The critic will also note that there are grave defects in Laplace's method of treatment.
But Laplace's calculations showed the new value to depend upon the excentricity of the earth's orbit, which, according; to theory, has a periodical variation of enormous period, and has been continually diminishing for thousands of years. Thus the solar influence has been diminishing, and the moon's mean motion increased.
I had about deduced from certain astronomic phenomena I have had under minute observation during the past several tropic nights an entirely new nebular hypothesis which will unquestionably startle the scientific world. I wish to consult a very excellent monograph on Laplace's hypothesis, which I understand is in a certain private collection in New York City. Your interference, Mr.
It has been possible here only to sketch out the chief personal points in his career, without dwelling much upon the scientific importance of his later life-long labours; but it must suffice to say briefly upon this point that Herschel's work was no mere mechanical star-finding; it was the most profoundly philosophical astronomical work ever performed, except perhaps Newton's and Laplace's.
But when we have, propounded by a mathematician of the highest authority, a theory of this evolution based on established mechanical principles, which accounts for these various peculiarities, as well as for many minor ones, the conclusion that the Solar System was evolved becomes almost irresistible. The general nature of Laplace's theory scarcely needs stating.
But this idea is unacceptable if for no other reason than that, as just said, all the spiral nebulæ possess the same kind of spectrum, and probably no one would be disposed to regard them all as outer universes. As we shall see later, the peculiarity of the spectra of the spiral nebulæ is appealed to in support of a modern substitute for Laplace's hypothesis.
There is a ``ring nebula'' in Lyra with a central star, and a ``planetary nebula'' in Gemini bearing no little resemblance to the planet Saturn with its rings, both of which appear to be practical realizations of Laplace's idea, and the elliptical rings surrounding the central condensation of the Andromeda Nebula may be cited for the same kind of proof.
But the Colonel's Wife was the worst. She manufactured the Station scandal, and TALKED TO HER AYAH! Nothing more need be said. The Colonel's Wife broke up the Laplace's home. The Colonel's Wife stopped the Ferris-Haughtrey engagement. The Colonel's Wife induced young Buxton to keep his wife down in the Plains through the first year of the marriage. Whereby little Mrs.
Our great astronomer, Adams, however, appears to have found a flaw in Laplace's calculation, and to have shown that only half the observed retardation could be accounted for in the way he had suggested. There remains, therefore, the other half to be accounted for; and here, in the absence of all positive knowledge, three sets of hypotheses have been suggested. Messrs.
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