The Sidereal Messenger, Wydanie 2

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Ormsby MacKnight Mitchel
Derby, Bradley & Company, 1848

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Strona 108 - I think, I may safely say, that there can be little, if any doubt as to the resolvability of the Nebula.
Strona 51 - The part of the sun's disc not occupied by spots is far from uniformly bright. Its ground is finely mottled with an appearance of minute, dark dots, or pores, which, when attentively watched, are found to be in a constunt state of change.
Strona 112 - Such is a summary of the hypothesis of La Place on the origin of the solar system. This hypothesis explains, in the most satisfactory manner, the three most remarkable phenomena presented by the planetary motions. " 1st. The motion of the planets in the same direction, and nearly in the same plane. " 2d. The motion of the satellites in the same direction as their planets.
Strona 84 - This is not a planet," and of No. 49, "This is a planet." I lost the opportunity of announcing the discovery by deferring the discussion of the observations, being much occupied with reductions of comet observations, and little suspecting that the indications of theory were accurate enough to give a chance of discovery in so short a time. On September 29, I saw, for the first time, the communication presented by M.
Strona 110 - ... from the centre of the sun, had necessarily an absolute velocity greater than the molecules of the inferior part which is nearest it, the rotatory motion, common to all the fragments, must always have been in the same direction as the orbitual motion.
Strona 70 - THE PLANET NEPTUNE is NOT THE PLANET TO WHICH GEOMETRICAL ANALYSIS HAD DIRECTED THE TELESCOPE ; that its orbit is not contained within the limits of space which have been explored by geometers searching for the source of the disturbances of Uranus ; and that its discovery by Galle must be regarded as a happy accident.
Strona 34 - Regiomontance, a work of the greatest utility and influence on the practice of astronomers in this respect. The principal instruments at first supplied to the Konigsberg Observatory were two, a transit by Dollond, and a meridian circle by Gary. This last instrument, though not itself of a very high order of excellence, may be considered as having been rendered so by the masterly and elaborate investigation of its errors of division which Bessel bestowed upon it. The complete investigation of instrumental...
Strona 80 - At that period, and for the space of the next hour, instead of an eclipse, or the umbra of the earth being the cause of the total obscurity of the moon, the whole phase of that body became very quickly and most beautifully illuminated, and assumed the appearance of the glowing heat of fire from the furnace, rather tinged with a deep red. The...
Strona 110 - ... of the sun, had necessarily an absolute velocity greater than the molecules of the inferior part which is nearest it, the rotatory motion, common to all the fragments, must always have been in the same direction as the orbitual motion. " However, if after their division one of these fragments...
Strona 82 - ... addition of what was far more important, viz. a list of the residual errors of the mean longitude of Uranus, for a period extending from 1690 to 1840, after taking account of the disturbing effect of the supposed planet. This comparison of observation with the theory implied the determination of all the unknown quantities of the problem, both the corrections of the elements of Uranus and the elements of the disturbing body. The smallness of the residual errors proved that the new theory was adequate...

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