Celestial Objects for Common TelescopesLongmans, Green, 1873 - 343 páginas |
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Página 2
... shew something never seen without them . I have a little hand telescope , 224 inches long when fully drawn out , with an object - glass of about 14 inches focus , and 1 inch aper- ture : this , with an astronomical eye - piece , will shew ...
... shew something never seen without them . I have a little hand telescope , 224 inches long when fully drawn out , with an object - glass of about 14 inches focus , and 1 inch aper- ture : this , with an astronomical eye - piece , will shew ...
Página 4
... shew colour under high powers where there is a great contrast of light and darkness . This ' outstanding ' or uncorrected colour results from the want of a perfect balance between the optical properties of the two kinds of glass of ...
... shew colour under high powers where there is a great contrast of light and darkness . This ' outstanding ' or uncorrected colour results from the want of a perfect balance between the optical properties of the two kinds of glass of ...
Página 11
... shew a gloss nor rub off ; or a piece of black cloth or velvet may be glued or pasted inside it . A dew - cap * The following remarks apply to metallic specula only . on the finder will often save much trouble . Should THE MODE OF ...
... shew a gloss nor rub off ; or a piece of black cloth or velvet may be glued or pasted inside it . A dew - cap * The following remarks apply to metallic specula only . on the finder will often save much trouble . Should THE MODE OF ...
Página 38
... shew the mottled . aspect ) , satisfactorily establishes the accuracy of that unique and most curious observation . This astronomer has left three volumes of drawings of the solar spots , commencing just in time for our present purpose ...
... shew the mottled . aspect ) , satisfactorily establishes the accuracy of that unique and most curious observation . This astronomer has left three volumes of drawings of the solar spots , commencing just in time for our present purpose ...
Página 39
... shew that it is not an ordinary spot , its appearance ought to be most critically examined with various powers and screen - glasses , and information sent in- stantly to the principal observatories within reach , that if a comet , it ...
... shew that it is not an ordinary spot , its appearance ought to be most critically examined with various powers and screen - glasses , and information sent in- stantly to the principal observatories within reach , that if a comet , it ...
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Términos y frases comunes
achr achromatic aperture Aquil astronomers atmosphere beautiful Binary bluish Boöt bright brighter brilliant Buffham Cassini centre Ceph Clusters colour comet constellation craters curious dark Dawes deep diameter disc Double Stars Drac dusky Earth eye-piece faint field flushed white globe greenish grey Herc Herschel Huggins interior Jupiter larger Lassell libration light lilac limb luminous lunar minute stars Moon motion naked eye nearly nebulæ noticed nucleus object object-glass observers orange pair pale blue pale white pale yellow photosphere Pisc planet proper motion Red Star reflector region remarkable Right Ascension ring ruddy satellites Schm Schr Schröter Schwabe Secchi seen shadow shew side silvery white smaller smalt solar sometimes spec spots streaks surface Taur telescope topaz Triple Virg visible xIxh xvih XVIII yellowish
Pasajes populares
Página 345 - A NEW STAR ATLAS, for the Library, the School, and the Observatory, in Twelve Circular Maps (with Two Index Plates). Intended as a Companion to ' Webb's Celestial Objects for Common Telescopes.
Página 46 - Fairest of stars, last in the train of night, If better thou belong not to the dawn, Sure pledge of day, that crown'st the smiling morn With thy bright circlet, praise Him in thy sphere, While day arises, that sweet hour of prime.
Página 182 - Lift up your eyes on high, and behold who hath created these things, that bringeth out their host by number; he calleth them all by names by the greatness of his might, for that he is strong in power; not one faileth.
Página 345 - Why didn't somebody teach me the constellations, too, and make me at home in the starry heavens which are always overhead, and which I don't half know to this day?
Página 30 - I have said, he spent to satisfy himself; six more years to satisfy, and still thirteen more to convince, mankind. For thirty years never has the Sun exhibited his disc above the horizon of Dessau without being confronted by Schwabe's imperturbable telescope, and that appears to have happened, on an average, about 300 days a year.
Página 65 - Webb makes the following remarks on the rills:—"These most singular furrows pass chiefly through levels, intersect craters (proving a more recent date), reappear beyond obstructing mountains, as though carried through by a tunnel, and commence and terminate with little reference to any conspicuous feature of the neighbourhood.