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Updated: June 14, 2025
Almost at the same time that the formation of the tail is observed a remarkable change takes place in the comet's head, which, by the way, is invariably and not merely occasionally its most important part. On approaching the sun the head usually contracts. Coincidently with this contraction a nucleus generally makes its appearance.
Immediately the aspect of life changed. Four young parties and a party who claimed to be old but wasn't were eager for anything that would furnish variety after the late monotony of existence. "I feel," said Mr. Campbell, "that we have all been suffering from certain states of mind that about match the 'Comet's' disguise, and it occurred to me that a change of air would be beneficial."
"I want to talk business with you or I wouldn't stop you," Pollard returned coolly. He came close to Comet's head and in the same, cool, impersonal voice continued. "When time comes for your last payment are you going to be able to make it?" "Until time does come," Thornton snapped at him, "it's my business what I'm going to do." "Certainly it's your business.
It necessitated, however, a long train of tedious calculations, and, in consequence, was not much used, astronomers generally preferring to attain the same end by a tentative process. In the year 1780, Laplace communicated to the Academy of Sciences an analytical method for determining the elements of a comet's orbit. This method has been extensively employed in France.
Her coming cheered them also, as if a sunbeam had entered the dark room. Miss Penelope left off what she was saying about the calamities that must be expected in consequence of the comet's tail coming loose from its head. The widow Broadnax relaxed her watch for a moment, as the fair young figure came toward the hearth and stood by her chair, resting a hand on her shoulder.
A few days later, M. Tempel found the head to consist of four lucid aggregations, ranged nearly along the prolongation of the caudal axis; and Dr. Common, January 27, 1883, saw five nuclei in a line "like pearls on a string." This remarkable character was preserved to the last moment of the comet's distinct visibility. It was a consequence, according to Dr.
The inclination of the plane of the cometary orbit to the plane of the ecliptic, an angle which is generally considerable, but in this case the planes were proved to coincide. The position of the ascending node, or the point where the comet crossed the terrestrial orbit. These two elements being obtained, the position in space of the comet's orbit was determined.
From study of atomic weights and estimates of the velocity of thrust of cometary tails, Bredichin concluded that the chief components of the various kinds of tails are hydrogen, hydrocarbons, and the vapor of iron; and spectroscopic analysis goes far towards sustaining these assumptions. But, theories aside, the unsubstantialness of the comet's tail has been put to a conclusive test.
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?
This is rendered more probable by the unexampled spectacle offered, October 14, to Professor Barnard, then of Nashville, Tennessee, of six or eight distinct cometary masses within 6° south by west of the comet's head, none of which reappeared on the next opportunity for a search. A week later, however, one similar object was discerned by Mr. W. R. Brooks, in the opposite direction from the comet.
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