Celestial Objects for Common TelescopesLongmans, Green, 1873 - 343 páginas |
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Página 3
... catalogue . The small mirror in a Newtonian causes a central darkness out of the focus , which should be nearly the same on either side of it . may be serviceable , but is not of high excellence B 2 THE TELEScope . 3.
... catalogue . The small mirror in a Newtonian causes a central darkness out of the focus , which should be nearly the same on either side of it . may be serviceable , but is not of high excellence B 2 THE TELEScope . 3.
Página 8
... central paste- board disc , supported by narrow arms from the sides , and leaving an open ring of light all round , may be tried . But for comets or nebulć , it will be best to restore the original aperture , as with faint and ill ...
... central paste- board disc , supported by narrow arms from the sides , and leaving an open ring of light all round , may be tried . But for comets or nebulć , it will be best to restore the original aperture , as with faint and ill ...
Página 19
... central rays of the spectrum . Herschel I. adopted , with great success , a trough containing a filtered mixture of ink and water . Cooper , at Markree Castle , Ireland , used a ' drum ' of alum water c 2 THE SOLAR SYSTEM PAGE xi.
... central rays of the spectrum . Herschel I. adopted , with great success , a trough containing a filtered mixture of ink and water . Cooper , at Markree Castle , Ireland , used a ' drum ' of alum water c 2 THE SOLAR SYSTEM PAGE xi.
Página 24
... central streak of a great double umbra : Secchi , during the eclipse , 1858 , March 15 , remarked a rose - coloured pro- montory in a spot visible to the naked eye . Schmidt records many tints , chiefly violet umbrć and yellowish ...
... central streak of a great double umbra : Secchi , during the eclipse , 1858 , March 15 , remarked a rose - coloured pro- montory in a spot visible to the naked eye . Schmidt records many tints , chiefly violet umbrć and yellowish ...
Página 45
... central in the field . As it advances , the part of Mercury not yet entered may be rendered visible by being projected upon the ' corona , ' which is so conspicuous in total solar eclipses , and has been known to relieve dark bodies in ...
... central in the field . As it advances , the part of Mercury not yet entered may be rendered visible by being projected upon the ' corona , ' which is so conspicuous in total solar eclipses , and has been known to relieve dark bodies in ...
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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 nebulć 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.