Celestial Objects for Common TelescopesLongmans, Green, 1873 - 343 páginas |
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Página 13
... occasional wiping ; the leather may be pressed to their edges with a bit of soft wood . Their flat faces are easily scratched if laid downwards on a table . The screws demand very gentle usage : a previous turn backwards , before ...
... occasional wiping ; the leather may be pressed to their edges with a bit of soft wood . Their flat faces are easily scratched if laid downwards on a table . The screws demand very gentle usage : a previous turn backwards , before ...
Página 22
... the mottled appearance ; 4 , the transparent atmosphere . 1. The Dark Spots . These are not always visible ; the disc is occasionally entirely free from them , but more fre- 6 quently one or more will be in sight . 22 THE SOLAR SYSTEM .
... the mottled appearance ; 4 , the transparent atmosphere . 1. The Dark Spots . These are not always visible ; the disc is occasionally entirely free from them , but more fre- 6 quently one or more will be in sight . 22 THE SOLAR SYSTEM .
Página 23
... occasionally found of especial brilliancy , and in one of them Secchi detected by the spectroscope a different con- stitution from that of the photosphere . In Dawes's very ingenious solar eye - piece , † a sliding plate , or wheel , of ...
... occasionally found of especial brilliancy , and in one of them Secchi detected by the spectroscope a different con- stitution from that of the photosphere . In Dawes's very ingenious solar eye - piece , † a sliding plate , or wheel , of ...
Página 24
... occasionally perceived the nuclei without any such assistance , and Buffham has seen them frequently with a 2 in ... occasional reddish - brown colour in spots , whose immediate contiguity to others of the ordinary greyish- black ...
... occasionally perceived the nuclei without any such assistance , and Buffham has seen them frequently with a 2 in ... occasional reddish - brown colour in spots , whose immediate contiguity to others of the ordinary greyish- black ...
Página 25
... occasionally comprises a group of them , and frequently outlasts them , is made up , according to Schwabe , of a multitude of black dots usually radiating in straight lines from the umbra . Secchi , with greater optical power , finds ...
... occasionally comprises a group of them , and frequently outlasts them , is made up , according to Schwabe , of a multitude of black dots usually radiating in straight lines from the umbra . Secchi , with greater optical power , finds ...
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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.