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Updated: June 22, 2025
Thus, also, aberration and nutation resulted as residual phenomena from that portion of the changes of the apparent places of the fixed stars which was left unaccounted for by precession.
It has been said that everything is infinitely high that we cannot see over. Hence, to the man who does not know, cube root is infinitely high and, as such, is as far away from his comprehension as the fourth dimension or the precession of the equinoxes. In the presence of even such a simple truth as cube root he stands helpless and enthralled.
Of course the precession of the equinoxes, due to that axial wobble in which our clumsy earth indulges, would change the apparent position of the fixed stars in reference to the sun, so that the same star could not do service as heliacal messenger indefinitely; but, on the other hand, these changes are so slow that observations by many generations of astronomers would be required to detect the shifting.
Another finds that the phenomena of precession and nutation require that the earth, if not entirely solid, must at least have a shell not less than eight hundred to a thousand miles in thickness. So there you are. You may take your choice." "And if it should prove solid?" I asked. "It will be all the same to us in the end, David," replied Perry.
While in Washington, he also visited the Secretaries of State, of the Treasury, and of War, and Major General Brown, of the United States army. Gen. Lafayette rode over to Georgetown, on Thursday, having been earnestly invited by the Mayor and corporation to visit the city. And the citizens demonstrated their gratitude and joy on the occasion, by a military escort, and a respectable precession.
Real cycles, divisions of time, have been gradually transformed into divisions of space; but the generality of the physical phenomena of the risings seems to prove that the zodiac which has been transmitted to us by the Greeks, and which, by the precession of the equinoxes, becomes an historical monument of high antiquity, may have taken birth far from Thebes, and from the sacred valley of the Nile.
It has to be corrected not only for nutation of the earth's axis and for precession of the equinoxes, but for aberration and for refraction; and the formation of the tables by which refraction is calculated, presupposes knowledge of the law of decreasing density in the upper atmospheric strata; of the law of decreasing temperature, and the influence of this on the density; and of hygrometric laws as also affecting density.
He was a stern, gaunt man, with a harsh voice, and an aggressive manner, but he had the merit of knowing how to assimilate the ideas of other men, and to pass them on in a way which was intelligible and even interesting to the lay public, with a happy knack of being funny about the most unlikely objects, so that the precession of the Equinox or the formation of a vertebrate became a highly humorous process as treated by him.
Hooper, the General has ordered me on a brief personal reconnoissance to the Planet Jupiter, and I wish you to take care of my watch, lest it should be damaged by the Precession of the Equinoxes," he would have responded with a brief "All right, Sir," and a quick military gesture, and have put the thing in his pocket.
He invented the infinitesimal calculus which is more suited for such calculations, but had he expressed his results in that language he would have been unintelligible to many. Newton's method of calculating the precession of the equinoxes, already referred to, is as beautiful as anything in the Principia.
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