The Sidereal Messenger, Wydanie 2Ormsby MacKnight Mitchel Derby, Bradley & Company, 1848 |
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Strona 13
... equator , it would require only the 1200th part of 12 hours , or 36 seconds of time . To follow an object flying with such amazing velocity , and to perform upon it any accurate measures , would be next to impossible but for the aid of ...
... equator , it would require only the 1200th part of 12 hours , or 36 seconds of time . To follow an object flying with such amazing velocity , and to perform upon it any accurate measures , would be next to impossible but for the aid of ...
Strona 36
... equator , as a consequence of the double division ( of the milky way ) on one side . It would moreover seem that of the two parts into which the milky way divides the heavens , that one is least in which the vernal equinox falls , and ...
... equator , as a consequence of the double division ( of the milky way ) on one side . It would moreover seem that of the two parts into which the milky way divides the heavens , that one is least in which the vernal equinox falls , and ...
Strona 52
... equator of the planet . A defect in the draw- ing has been quite as extensively copied . In the engraving from Herschel's picture , the shadow cast by the planet on the ring is represented by a faint shading , not darker than the belts ...
... equator of the planet . A defect in the draw- ing has been quite as extensively copied . In the engraving from Herschel's picture , the shadow cast by the planet on the ring is represented by a faint shading , not darker than the belts ...
Strona 64
... equator of the planet , and a dark belt just below the bright one . The lower hemisphere of the planet less luminous than the upper . The surface of the ring more luminous than that of the planet , but less bright than the bright belt ...
... equator of the planet , and a dark belt just below the bright one . The lower hemisphere of the planet less luminous than the upper . The surface of the ring more luminous than that of the planet , but less bright than the bright belt ...
Strona 67
... Equator . Our new revision , made at Pulkova , ex- tends only from the North Pole to the Equator . Therefore it seems to be very desirable that your beautiful instrument be employed exactly where the Pulkova instrument ceases . That ...
... Equator . Our new revision , made at Pulkova , ex- tends only from the North Pole to the Equator . Therefore it seems to be very desirable that your beautiful instrument be employed exactly where the Pulkova instrument ceases . That ...
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61 Cygni angle appearance astronomers axis Bessel body Bradley bright brilliant catalogue celestial Cincinnati Astronomical Society Cincinnati Observatory circle clusters comet commenced computed constellation deduced density determined diameter direction disc discovered discovery double stars earth eclipse elements entire equal equator equinox error examination existence fact field of view fixed stars heavens Herschel hypothesis instrument Jupiter large star Le Verrier light longitude Maedler magnitude mass mean distance measures memoir meridian Milky minute moon moon's naked eye nearly nebula Neptune night number of stars nutation object observations obtained orbit parallax pass perihelion period perturbations phenomena planet pole position present principal Prof proper motion radius Refractor remarkable revolution right ascension ring satellite Saturn seen SIDEREAL MESSENGER solar system space sphere spots Struve sun's surface telescope theory tion Uranus vernal equinox Verrier zone
Popularne fragmenty
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...