Comets [pp. 105-107]

Appletons' journal: a magazine of general literature. / Volume 12, Issue 279

18 4.] COLIfETh. 105 circumstance without, that no manly man would, consciously, enact the unequal part. Unconsciously, it is luis favorite rleo; only at intervals is his suspicion awakened that he is a Drawcansir of the drawing-room, a Bobadil of the boudoir. Should his suspicion amount to conviction, he is covered with mortification, and resolves thereafter to show his prowess in a field whence contest is not banished. Would that man might oftener detect his despotic disposition, and carry it where rugged opposition might effect its cure! Illumination of the ampler sort is needed for the fair disclosure; and the few to whom it comes, should bless their fortune. It is questionable if men of lofty character and ideal tendency would not, were election imperative, prefer to be ranked rather among the henpecked than the tyrants. Those would, at worst, be mildly dominated; and the domination would not be irksome, because they who bear it would be mindful that it could be readily overthrown. These would be deteriorated by growing selfishness, stultified by the license of conceit. Those would be comforted by the thought that the chains they wear were wrought from flowers; that the annoyances they endure must have the ending of a comedy. These would be cankered by the base habit they indulge, and be stung some time with the memory that they had struck away the clinging hands of love. Every government is more or less a gynocracy, notwithstanding the withholding of feminine suffrage. Every man, if he rise to genuine manhood, is some time or other under the rule of women; the some time or -other frequently including the better part of his life. If he must be so subjected-and he usuallyrefuses not to be-it is well his subjecter should be his wife, since her interest is his, and she can hardly lead him so far astray that he may not woo hert back by sweetness and sincerity. Why should helnpecked be applied to marriage alone, as though there were a stigma in any large concession to her who is its undisputed queen? Romancers and poets paint in golden hues the enslavement of lovers, and the world reads them with eager approval. The bard is not yet born that has sung the glories of henpecked husbands, who merit more admiration and sympathy than they get-if for no other reason, for their radiant rarity. Illustrious characters, innumerable heroes, have been chronicled as henpecked; and yet their henpeckedness has not hurt their fame, nor interfered with their idealization. Tyrant lieges always stain a life they may otherwise have ennobled, dash with contempt such veneration as they may have evoked. Of the henpecked, there is always hope; for the tyrant, there is danger of despair. One usually has the elements of goodness and generosity; the other is likely to be fixed in sordidness and insensibility. Henpeckedhess is, after all, more an echo than a voice; a figment than a reality; a suspicion than a truth. If the cock-cowed wives could but tell their story, would not many of their husbands beg to be named among the henpecked for very shame? JUNSIUS HENRI BROWNE. COMETS. LD Leonard Digges, ill his "Prognosti cations for 1556," tells us that "com etes signific corruptions of the ayre. They are signs of earthquakes, of warres, of chan gying kyngdomes, great dearthe of corne, yea a common death of man and beast." Quite up to the middle of the eighteenth century, similar ideas regarding these strange visitors were universally held in Europe. They were hardly supposed to be the legiti mate objects of research, and we accordingly have singularly few accurate descriptions of the earlier ones which were visible in Europe. The Chinese, however, if they knew very lit tle about them, still catalogued their places among the fixed stars with great assiduity, so that we frequently owe all our knowledge of an ancient comet to the patience of the Chinese astronomer-royals (for there were al ways two of them, He and Ho). The record of Man-tuan-lin, which con tains an account of comets visible in China between the years 611 B. c. and 1640 A. D., has lately become accessible through the translation by Dr. Williams, late Secretary of the Royal Astronomical Society. Astron omers have assiduously collected all refer ences in classic literature to appearances in the sky which might have been comets, and the number of such objects is about five hun dred, which, with the three hundred known comets, makes eight hundred: thus Kepler is partly justified in his saying that "there are more comets in the sky than fish in the ocean," particularly if we consider that a comet, to have a place in one of the ancient records, must have been at least as bright as the comet of Coggia, which we see every evening in our northwestern sky, and when we further remember that, for every one as bright as this, there are probably fifty which are only visible in the telescope. In fact, nearly every year six or eight telescopic com ets are found by various observers, while a brilliant comet comes not more than once in a decade, on the average. These telescopic comets were physically of little interest until lately. They usually consist of a nucleus more or less bright, sur rounded by a globular mist or nebulous mass, which is generally extremely faint. No amount of telescopic scrutiny will reveal more than the bald fact of their existence, and the secret of their physical structure was a kind of astronomical oyster which it re mained for spectrum analysis to open. Nevertheless, astronomers were assiduous in searching for them and in computing their orbits, and they have been rewarded by the finding of some very interesting objects of this class. We may say, as a general rule, that comets move in an orbit of which the shape is nearly parabolic. Of two hundred and thirty-nine comets whose orbits had been accurately as signed up to 1866, one hundred and seventy eight moved in parabolas, five in hyperbolas, which differed little from a parabola, and fifty-six in ellipses. It is the comets which move in ellipses | which are peculiarly interesting, for, from the nature of the ellipse, which is a closed curve, a comet of such an orbit must be a member of our own system, and such a one, oncediscovered, we expect to see again. The comet which moves in a parabola comes into the system, moves rapidly through it, and, circling round the sun, leaves us forever-unless, indeed, it is caught by some of the exterior planets, and, by the virtue of their attraction, has its orbit changed to an ellipse. Of the fifty-six comets with elliptic orbits (periodic comets), nineteen are well known, and these have returned to us obedient to the law of their motion; two of them (Encke's and Halley's) have returned each no less than sixteen times. The two comets last named are of exceeding interest. All Europe was, in 1680, in exactly the state of mind which Master Digges has described so well: a comet was "a corruption of the ayre," a thing of evil omen. In 1680 appeared a magnificent comet, which was an object of the greatest fear and wonder. In 1684 Newton published his "Principia," in which he discussed the orbits of comets in general, and particularly the orbit of this comet, according to his general method. Halley, who was then a young student of astronomy, was led, by the reading of the "Principia," to the examination of the orbits of several previously-recorded comets, and his labor and genius were rewarded by the grand discovery that the comet of 1682 had previously been seen in 1607, and, even before that, in 1531. Hence he concluded that its period was in the neighborhood of seventyfive years, and he predicted its return in 1758. This was a great step in advance; for, if a comet were simply a body amenable to the ordinary laws of the planets, its terror was removed. Then, again, this prediction was a great step for astronomy, showing as it did that the science was gradually acquiring certainty and confidence. Halley at first inferred that, as the comet of 1682 had appeared seventy-five and a half years previously, so it would return seventyfive and a half years from that time. But if it were to be regarded, so far as its relations to the laws of motion went, as a planetary body, why, then, it must be subject to perturbations, produced by neighboring bodies, just as planets are. So that he was led to reexamine his calculations, and to compute the perturbations produced by Jupiter. From all considerations he assigned the end of 1758 or the beginning of 1759 as the epoch of its reappearance. The great fame of Halley caused his prediction to be received with wide-spread interest, and, as the time of its predicted reappearance approached, expectation was at its height, more particularly because a great French geometer, Clairaut, had reexamined Halley's orbit, and had assigned April 13, 1759, as the day of its nearest approach to the sun. It was, in fact, seen on Christmas-day, 1758, and its perihelion passage was on March 12, 1759, one month earlier than the predicted time. This was, indeed, a great triumph for sci 18.4.] C 0_~EI'$S. 105


18 4.] COLIfETh. 105 circumstance without, that no manly man would, consciously, enact the unequal part. Unconsciously, it is luis favorite rleo; only at intervals is his suspicion awakened that he is a Drawcansir of the drawing-room, a Bobadil of the boudoir. Should his suspicion amount to conviction, he is covered with mortification, and resolves thereafter to show his prowess in a field whence contest is not banished. Would that man might oftener detect his despotic disposition, and carry it where rugged opposition might effect its cure! Illumination of the ampler sort is needed for the fair disclosure; and the few to whom it comes, should bless their fortune. It is questionable if men of lofty character and ideal tendency would not, were election imperative, prefer to be ranked rather among the henpecked than the tyrants. Those would, at worst, be mildly dominated; and the domination would not be irksome, because they who bear it would be mindful that it could be readily overthrown. These would be deteriorated by growing selfishness, stultified by the license of conceit. Those would be comforted by the thought that the chains they wear were wrought from flowers; that the annoyances they endure must have the ending of a comedy. These would be cankered by the base habit they indulge, and be stung some time with the memory that they had struck away the clinging hands of love. Every government is more or less a gynocracy, notwithstanding the withholding of feminine suffrage. Every man, if he rise to genuine manhood, is some time or other under the rule of women; the some time or -other frequently including the better part of his life. If he must be so subjected-and he usuallyrefuses not to be-it is well his subjecter should be his wife, since her interest is his, and she can hardly lead him so far astray that he may not woo hert back by sweetness and sincerity. Why should helnpecked be applied to marriage alone, as though there were a stigma in any large concession to her who is its undisputed queen? Romancers and poets paint in golden hues the enslavement of lovers, and the world reads them with eager approval. The bard is not yet born that has sung the glories of henpecked husbands, who merit more admiration and sympathy than they get-if for no other reason, for their radiant rarity. Illustrious characters, innumerable heroes, have been chronicled as henpecked; and yet their henpeckedness has not hurt their fame, nor interfered with their idealization. Tyrant lieges always stain a life they may otherwise have ennobled, dash with contempt such veneration as they may have evoked. Of the henpecked, there is always hope; for the tyrant, there is danger of despair. One usually has the elements of goodness and generosity; the other is likely to be fixed in sordidness and insensibility. Henpeckedhess is, after all, more an echo than a voice; a figment than a reality; a suspicion than a truth. If the cock-cowed wives could but tell their story, would not many of their husbands beg to be named among the henpecked for very shame? JUNSIUS HENRI BROWNE. COMETS. LD Leonard Digges, ill his "Prognosti cations for 1556," tells us that "com etes signific corruptions of the ayre. They are signs of earthquakes, of warres, of chan gying kyngdomes, great dearthe of corne, yea a common death of man and beast." Quite up to the middle of the eighteenth century, similar ideas regarding these strange visitors were universally held in Europe. They were hardly supposed to be the legiti mate objects of research, and we accordingly have singularly few accurate descriptions of the earlier ones which were visible in Europe. The Chinese, however, if they knew very lit tle about them, still catalogued their places among the fixed stars with great assiduity, so that we frequently owe all our knowledge of an ancient comet to the patience of the Chinese astronomer-royals (for there were al ways two of them, He and Ho). The record of Man-tuan-lin, which con tains an account of comets visible in China between the years 611 B. c. and 1640 A. D., has lately become accessible through the translation by Dr. Williams, late Secretary of the Royal Astronomical Society. Astron omers have assiduously collected all refer ences in classic literature to appearances in the sky which might have been comets, and the number of such objects is about five hun dred, which, with the three hundred known comets, makes eight hundred: thus Kepler is partly justified in his saying that "there are more comets in the sky than fish in the ocean," particularly if we consider that a comet, to have a place in one of the ancient records, must have been at least as bright as the comet of Coggia, which we see every evening in our northwestern sky, and when we further remember that, for every one as bright as this, there are probably fifty which are only visible in the telescope. In fact, nearly every year six or eight telescopic com ets are found by various observers, while a brilliant comet comes not more than once in a decade, on the average. These telescopic comets were physically of little interest until lately. They usually consist of a nucleus more or less bright, sur rounded by a globular mist or nebulous mass, which is generally extremely faint. No amount of telescopic scrutiny will reveal more than the bald fact of their existence, and the secret of their physical structure was a kind of astronomical oyster which it re mained for spectrum analysis to open. Nevertheless, astronomers were assiduous in searching for them and in computing their orbits, and they have been rewarded by the finding of some very interesting objects of this class. We may say, as a general rule, that comets move in an orbit of which the shape is nearly parabolic. Of two hundred and thirty-nine comets whose orbits had been accurately as signed up to 1866, one hundred and seventy eight moved in parabolas, five in hyperbolas, which differed little from a parabola, and fifty-six in ellipses. It is the comets which move in ellipses | which are peculiarly interesting, for, from the nature of the ellipse, which is a closed curve, a comet of such an orbit must be a member of our own system, and such a one, oncediscovered, we expect to see again. The comet which moves in a parabola comes into the system, moves rapidly through it, and, circling round the sun, leaves us forever-unless, indeed, it is caught by some of the exterior planets, and, by the virtue of their attraction, has its orbit changed to an ellipse. Of the fifty-six comets with elliptic orbits (periodic comets), nineteen are well known, and these have returned to us obedient to the law of their motion; two of them (Encke's and Halley's) have returned each no less than sixteen times. The two comets last named are of exceeding interest. All Europe was, in 1680, in exactly the state of mind which Master Digges has described so well: a comet was "a corruption of the ayre," a thing of evil omen. In 1680 appeared a magnificent comet, which was an object of the greatest fear and wonder. In 1684 Newton published his "Principia," in which he discussed the orbits of comets in general, and particularly the orbit of this comet, according to his general method. Halley, who was then a young student of astronomy, was led, by the reading of the "Principia," to the examination of the orbits of several previously-recorded comets, and his labor and genius were rewarded by the grand discovery that the comet of 1682 had previously been seen in 1607, and, even before that, in 1531. Hence he concluded that its period was in the neighborhood of seventyfive years, and he predicted its return in 1758. This was a great step in advance; for, if a comet were simply a body amenable to the ordinary laws of the planets, its terror was removed. Then, again, this prediction was a great step for astronomy, showing as it did that the science was gradually acquiring certainty and confidence. Halley at first inferred that, as the comet of 1682 had appeared seventy-five and a half years previously, so it would return seventyfive and a half years from that time. But if it were to be regarded, so far as its relations to the laws of motion went, as a planetary body, why, then, it must be subject to perturbations, produced by neighboring bodies, just as planets are. So that he was led to reexamine his calculations, and to compute the perturbations produced by Jupiter. From all considerations he assigned the end of 1758 or the beginning of 1759 as the epoch of its reappearance. The great fame of Halley caused his prediction to be received with wide-spread interest, and, as the time of its predicted reappearance approached, expectation was at its height, more particularly because a great French geometer, Clairaut, had reexamined Halley's orbit, and had assigned April 13, 1759, as the day of its nearest approach to the sun. It was, in fact, seen on Christmas-day, 1758, and its perihelion passage was on March 12, 1759, one month earlier than the predicted time. This was, indeed, a great triumph for sci 18.4.] C 0_~EI'$S. 105

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