Monthly Notices of the Royal Astronomical Society, Band 43;Bände 1882-1883Priestley and Weale, 1883 Beginning with 1978, articles on microfiche are enclosed with some issues. |
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10-foot Equatorial Aden Al-Sufi angle aperture appearance Applying a proper Astronomer Royal axis Bisection bright brighter Catalogue centre clouds coefficients colour comet comparison stars Corrected for P.M. dark determination diameter disk distance double stars Durban eccentric anomaly eclipse Epoch of Obs error eyepiece faint Finlay Glasgow Greenwich Greenwich Mean Heliometer inches instrument internal contact J. C. Adams Jupiter Lalande Last contact light longitude magnitude Mean Epoch Mean N.P.D. Mean R.A. measures meridian meteor method micrometer Monthly Notices Moon nebula nucleus Observations of Comet obtained Oeltzen orbit parallax perihelion personal equation photographs places planet position position-angle Prof proper motion proper motion equal reduction remarkable Right Ascension Royal Observatory satellites Schjellerup seen Sept Society spectroscope spectrum spot tail telescope tion Transit Circle Transit of Venus visible
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Seite 179 - CHALLIS. — Creation in Plan and in Progress : Being an Essay on the First Chapter of Genesis.
Seite 163 - 1 have lost no opportunity of searching for the planet; and, the nights having been generally pretty good, I have taken a considerable number of observations : but I get over the ground very slowly, thinking it right to include all stars to 10-11 magnitude; and I find that to scrutinise thoroughly in this way the proposed portion of the heavens will require many more observations than I can take this year.
Seite 167 - Planet," evidently showing the conviction in his own mind of the reality of its existence. Towards the end of the next month, a communication of results slightly different was made to the Astronomer Royal, with the 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...
Seite 218 - ... case, at least, the values in the two tables differ systematically at certain points. It is the experience of the writer that the periodicity thus introduced sometimes amounts to one fourth or one fifth as much as the systematic deviation of the catalogue compared from the normal system. In the paper on " A Comparison of the Harvard College Observatory Catalogue of Stars for 1875.0 with the Fundamental Systems of Auwers, Safford, Boss, and Newcomb," the method here described has been essentially...
Seite 181 - Juvenile Poems by Thomas Romney Robinson, to which is prefixed a short account of the Author by a Member of the Belfast Literary Society": Belfast, 1806.
Seite 168 - The preceding details are intended to point out the circumstances which led astronomers to suspect the existence of an additional body of the solar system, and the theoretical reasons there were for undertaking to search for it. No one could have anticipated that the place of the unknown body was indicated with any degree of exactness by a theory of this kind. It might reasonably be supposed, without at all mistrusting the evidence which the theory gave of the existence of the planet, that its position...
Seite 233 - The past year has been signalised by the successful application of the improved dry-plate processes of photography to nebula; as well as to comets. Dr. Huggins has obtained a photograph of the spectrum of the nebula in Orion with an exposure of 45 minutes, using the same spectroscope and 1 8-inch reflector which he employed for his photographs of star-spectra. This photograph shows a very strong bright line in the ultra-violet at wave-length 3730, in addition to the four nebular lines previously...
Seite 250 - ... i . But. although Dr. Gould had these possible sources of error before his mind, he has been led, after a careful discussion of his own observations, to infer that the preponderance of the brighter stars is due to the existence of a stellar cluster consisting of some four or five hundred stars, of which our own system is supposed to be a member. The position of the northern pole of the medial plane of this belt of stars has been fixed by Dr. Gould at RA i ih 25°, NPD 60°, whilst that of the...
Seite 199 - Cassegrainian belonging to the Royal Society. 'The exposure,' says Dr. Huggins, ' was limited by the coming up of clouds to forty-five minutes.' ' The photographic plate shows a spectrum of bright lines, and also a narrower continuous spectrum, which I think must be due to stellar light. The bright stars forming the trapezium in the " fish's mouth " of the nebula were kept close to the side of the slit, so that the light from the adjacent part of the nebula might enter the slit.
Seite 377 - Wardhus, before there was any possibility of communication with other observers. Third. The addition of the time of the formation of the thread of light was suggested by the accounts of other observers ; but the time itself is Hell's own, obtained possibly from estimation and memory, but more probably from a memorandum made at the time of observation^ which he neglected to insert in his journal. Fourth. The...