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Updated: June 24, 2025
Stimulated by this success, Leverrier calculated an orbit for an interior planet from perturbations of Mercury, but though prematurely christened Vulcan, this hypothetical nursling of the sun still haunts the realm of the undiscovered, along with certain equally hypothetical trans-Neptunian planets whose existence has been suggested by "residual perturbations" of Uranus, and by the movements of comets.
Not one of the characters is an individual; they are all little monsters amusing monsters, it is true dressed up to display the stock ambitions and the stock resentments and the stock affectations and the stock perturbations of the heart which attend the middle teens.
His character was open for investigation. Judge Henry would vouch for him. This is what he would have said to his sweetheart had she but revealed to him her perturbations. But she did not reveal them; and they were not of the order that he with his nature was likely to divine.
According to the figures published by the Statistical Society of Berne, the general rise in prices attributed to the war hit Italy much harder than any of her allies. The consequences of this and other perturbations were sinister and immediate.
The professor, it is true, in his estimate of the duration of his comet's revolution, had represented that he had made all proper allowances for any perturbations that would be caused either by Jupiter, by Saturn, or by Mars; but what if there were any errors in his calculations? what if there should be any elements of disturbance on which he had not reckoned?
These affections are caused in almost every case by serious perturbations in the social position of the subject; and it cannot be denied that the more the position is elevated, the more profound are the perturbations. It is, besides, an affection the more to be remarked from its peculiar character.
A metallic currency runs from nation to nation, and has its perturbations corrected from nation to nation; but a paper currency is local, and cannot be so well corrected by the great interchanges of the globe. Let us make this clearer in another way.
It was not hoped that any calculation of the perturbations of other planets would show the place of the stranger, though certain changes in the orbit of Mercury seemed clearly enough to indicate the stranger's existence.
After he had taken his degree, and had thus obtained a little relaxation from the lines within which his studies had previously been necessarily confined, Adams devoted himself to the study of the perturbations of Uranus, in accordance with the resolve which we have just seen that he formed while he was still an undergraduate.
Calculation does not yield in precision to direct observation. In this group of satellites, considered as an independent system of bodies, Laplace found a series of perturbations analogous to those which the planets experience.
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