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appeared astronomers attention August bright Capt Catalogue centre colour comet Common compared complete considerable considered continued correction course dark determined direction distance doubt eclipse equal error fact give given Greenwich important increase interesting July June Jupiter less light lines magnitude March marked matter mean measures medal meeting meteors method miles Moon motion nearly night Notes noticed object observations Observatory obtained orbit parallax passed period photographs planet plates portion position possible present probably Prof published question radiant recently referred regard remarkable Report Royal satellite seems seen short side Society solar spectrum stars streaks Swift taken telescope variable visible whole
Seite 277 - Catalogue at the end of 1886, a new list of some 3000 stars was prepared, to include all the stars in Groombridge's Catalogue and in the Harvard Photometry, which had not been observed at Greenwich since 1867.
Seite 269 - It would not be difficult to arrange a camera box capable of exposing a surface sufficient to obtain a map of two degrees square, and with instruments of large aperture we may hope to reach much smaller stars than I have yet taken. There is also every probability that the chemistry of photography will be very much improved, and more sensitive methods devised.
Seite 429 - I. All self-luminous bodies in the celestial spaces are composed of meteorites, or masses of meteoritic vapour produced by heat brought about by condensation of meteor-swarms due to gravity. II. The spectra of all bodies depend upon the heat of the meteorites, produced by collisions, and the average space between the meteorites in the swarm, or in the case of consolidated swarms upon the time which has elapsed since complete vaporization.
Seite 33 - JS" •Titan Nearest Approaches of Hyperion and Titan Feb. 6 and Apr. 10 SATELLITES OF UEANUS. w Apparent Orbits of the Satellites of Uranus, as Been in an inverting telescope. The small circle in the above diagram represents the planet and is on the same scale as the orbits. The arrows show the direction of the motion of the Satellites, and the figures indicate the number of days from the time of the last North. Elongation. Greenwich Mean Times of North Elongations.
Seite 430 - XI. New stars, whether seen in connection with nebulae or not, are produced by the clash of meteor swarms, the bright lines seen being low-temperature lines of elements the spectra of which are most brilliant at a low stage of heat.
Seite 118 - It was proposed and carried that the Report of the Council be received and adopted, and that it be printed and circulated in the usual manner together with the Report of the Auditors and the President's Address.
Seite 293 - ... publishing them in a suitable form. A field of work of great extent and promise is open, and there seems to be an opportunity to erect to the name of Dr. Henry Draper a memorial such as heretofore no astronomer has received. One cannot but hope that such an example may be imitated in other departments of astronomy, and that hereafter other names may be commemorated, not by a needless duplication of unsupported observatories, but by the more lasting monuments of useful work accomplished.
Seite 430 - ... the bright lines seen being low-temperature lines of elements the spectra of which are most brilliant at a low stage of heat. XII. Most of the variable stars which have been observed belong to those classes of bodies which I now suggest are uncondensed meteorswarms, or condensed stars in which a central more or less solid condensed mass exists.
Seite 120 - Fourier never admitted the validity of this decision. Even at the close of his life he gave unmistakable evidence that he thought it unjust, by causing his memoir to be printed in our volumes without changing a single word. Still, the doubts expressed by the Commissioners of the Academy reverted incessantly to his recollection. From the very beginning they had poisoned the pleasure of his triumph. These first impressions, added to a high susceptibility, explain how Fourier ended by regarding with...