Celestial Objects for Common TelescopesLongmans, Green, 1873 - 343 páginas |
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... , not with the eyes of others , but with our own . This , however , is no easy matter : nor is the want of a telescope the only difficulty . Instruments quite suffi- cient for the student's purpose are far less expensive than.
... , not with the eyes of others , but with our own . This , however , is no easy matter : nor is the want of a telescope the only difficulty . Instruments quite suffi- cient for the student's purpose are far less expensive than.
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Thomas William Webb. cient for the student's purpose are far less expensive than formerly ; a trifling outlay will often procure them , of excellent quality , at second - hand ; and many are only waiting to be called into action . But a ...
Thomas William Webb. cient for the student's purpose are far less expensive than formerly ; a trifling outlay will often procure them , of excellent quality , at second - hand ; and many are only waiting to be called into action . But a ...
Página 2
... less , especially with faint objects , but are often very perfect and distinct : and even diminutive glasses , if good , are not to be despised ; they will shew something never seen without them . I have a little hand telescope , 224 ...
... less , especially with faint objects , but are often very perfect and distinct : and even diminutive glasses , if good , are not to be despised ; they will shew something never seen without them . I have a little hand telescope , 224 ...
Página 5
... less pleasant in use : with a telescope twice as long , half the depth in the eye - piece produces an equal power . The focal picture , as in the camera , is always inverted , and so in the astronomical eye - piece it remains . * For ...
... less pleasant in use : with a telescope twice as long , half the depth in the eye - piece produces an equal power . The focal picture , as in the camera , is always inverted , and so in the astronomical eye - piece it remains . * For ...
Página 7
... less than the clear aperture ; -if the indistinctness is thus diminished but not removed , try several discs of pasteboard placed succes- sively within this cap , with progressively contracted openings , till distinct vision is obtained ...
... less than the clear aperture ; -if the indistinctness is thus diminished but not removed , try several discs of pasteboard placed succes- sively within this cap , with progressively contracted openings , till distinct vision is obtained ...
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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.