Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 21, 2025
But why did the sun rise and set every fifteen hours or thereabout, and so make what I have called a "day" and "night"? Why did he not continue in the same spot, except for the slow change caused by the nutation or nodding of Venus?
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.
The slightest inconsistency between what appeared and what was to be expected roused his keenest attention; and he never relaxed his mental grip of a subject until it had yielded to his persistent inquisition. It was to these qualities that he owed his discoveries of the aberration of light and the nutation of the earth's axis. The first was announced in 1729.
In the same way, while trying to detect the annual parallax of the stars, he failed in that quest, but discovered binary systems of stars revolving in ellipses round each other; just as Bradley's attack on stellar parallax failed, but led to the discovery of aberration, nutation, and the true velocity of light. Parallax.
I ought perhaps to mention that Professor Gazen carried out his intention of reading a paper to the Royal Astronomical Society on his alleged discovery of a diurnal nutation or "wobbling" of the planet Venus; but I regret to say that owing to preconceived opinions and personal prejudices, his ingenious theory met with a reception far below its merits.
A moment's reflection regarding the obliquity of the earth's axis, nutation, the precession of the equinoxes, the eccentricity of the orbit and the changes in the position of the orbit, will show us what ample room there was for a special adjustment and adaptation between the earth and its satellite and between both to the solar centre.
Stimulated by the consciousness of having the command of an instrument of unique perfection, Brinkley loftily attempted the very highest class of astronomical research. He resolved to measure anew with his own eye and with his own hand the constants of aberration and of nutation. He also strove to solve that great problem of the universe, the discovery of the distance of a fixed star.
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.
The search for it had already led Bradley to the important discoveries of the aberration of light and the nutation of the earth's axis; it was now about to lead Herschel to a discovery of a different, but even more elevated character. Yet in neither case was the object primarily sought attained.
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.
Word Of The Day
Others Looking