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alluded appeared approximately article by Wurm asserted asteroids Astronomer Royal beautiful beginner Bessel Bode Bode's law chapter CHRISTIAN EXAMINER clouds comet was seen comets are mentioned computed consider deviations differ diffuse disc discovery of Neptune eccentricity eclipses elementary elements errors EXAMINER FOR SEPTEMBER fact formula geometer given Godfrey Godfrey's claim Halley Halley's Halley's comet heat heavens height HERSCHEL'S OUTLINES hyperbolic hypothesis Iapetus illustrious invention Jupiter knowledge known labors Le Verrier letter longitude of Uranus mathematicians mean distance METCALF AND COMPANY Mimas months moon motion nearly north latitude observed orbit of Uranus Outlines of Astronomy Peirce's perhaps perihelion passage period planet position possible intermediate returns present probably Professor Peirce published rays remark satellites says Pingre semi-axis sextant Sir John Herschel solar system speak star telescope Tethys theory of Neptune tion Titius Treatise unquestionably Uranus's greatest Verrier and Adams visible Voiron William Herschel
Strona 17 - ... adverse to notions he may have previously formed for himself, or taken up, without examination, on the credit of others. Such an effort is, in fact, a commencement of that intellectual discipline which forms one of the most important ends of all science. It is the first movement of approach towards that state of mental purity which alone can fit us for a full and steady perception of moral beauty as well as physical adaptation. It is the " euphrasy and rue " with which we must " purge our sight...
Strona 11 - ... From that time, though not yet arrived at its perihelion, it decreased with such rapidity that already, on the 29th, it was only 3°, and on November 5th, 2 J° in length. There is every reason to believe that before the perihelion, the tail had altogether disappeared, as, though it continued to be observed at Pulkowa up to the very day of its perihelion passage, no mention whatever is made of any tail being seen.
Strona 17 - ... supported by careful observation and logical argument, even should it prove of a nature adverse to notions he may have previously formed for himself, or taken up, without examination, on the credit of others. Such an effort is, in fact, a commencement of that intellectual discipline which forms one of the most important ends of all science.
Strona 6 - ... 421, 245 or 247, 180, 158. Should this view of the subject be the true one, we may expect its return about the end of 1864 or beginning of 1865, in which event it will be observable in the Southern Hemisphere, both before and after its perihelion passage.
Strona 14 - Bessel remarked that the motions of Uranus, as he had satisfied himself by careful examination of the recorded observations, could not be accounted for by the perturbations of the known planets ; and that the deviations far exceeded any possible limits of error of observation. In reply to the question, Whether the deviations in question might not be due to the action of an unknown planet? — he stated that he considered it highly probable that such was the case, — being systematic, and such as...