Celestial Objects for Common Telescopes |
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... MOON . 57 URANUS AND NEPTUNE 168 INDEX TO THE MAP OF THE COMETS 169 MOON 120 PART III . THE STARRY HEAVENS , DOUBLE STARS , CLUSTERS , AND NEBULE ANDROMEDA ANSER . ANTINOUS AQUARIUS AQUILA ARGO NAVIS ARIES . AURIGA • BOOTES 182 ...
... MOON . 57 URANUS AND NEPTUNE 168 INDEX TO THE MAP OF THE COMETS 169 MOON 120 PART III . THE STARRY HEAVENS , DOUBLE STARS , CLUSTERS , AND NEBULE ANDROMEDA ANSER . ANTINOUS AQUARIUS AQUILA ARGO NAVIS ARIES . AURIGA • BOOTES 182 ...
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... Moon is too easy ; Venus too severe except for first - rate glasses ; large stars have too much glare ; Jupiter or Saturn are far better ; a close double star is best of all for an experienced eye ; but for general purposes a moderate ...
... Moon is too easy ; Venus too severe except for first - rate glasses ; large stars have too much glare ; Jupiter or Saturn are far better ; a close double star is best of all for an experienced eye ; but for general purposes a moderate ...
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... moon and planets ; and a third , as powerful as the telescope will bear , for minuter objects , especially double stars . A greater number of eye - pieces admits , how- It is erect in the Galilean eye - piece and the Gregorian reflector ...
... moon and planets ; and a third , as powerful as the telescope will bear , for minuter objects , especially double stars . A greater number of eye - pieces admits , how- It is erect in the Galilean eye - piece and the Gregorian reflector ...
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... moon or a planet in a corresponding position . Several trials may be made , and the mean result in minutes and seconds of time multiplied by 15 will give the diameter of the field in minutes and seconds of arc , or space . 7. Do not be ...
... moon or a planet in a corresponding position . Several trials may be made , and the mean result in minutes and seconds of time multiplied by 15 will give the diameter of the field in minutes and seconds of arc , or space . 7. Do not be ...
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... Moon in eclipses , a fact remarked by Airy , and exhibited by photography ; and Secchi has observed that the occasional bad definition of the spots Arago's polariscope failed to exhibit this difference ; it has been shewn by the latter ...
... Moon in eclipses , a fact remarked by Airy , and exhibited by photography ; and Secchi has observed that the occasional bad definition of the spots Arago's polariscope failed to exhibit this difference ; it has been shewn by the latter ...
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Common terms and phrases
achr achromatic æther aperture appearance ARGO NAVIS astronomers atmosphere beautiful belts binary blue bluish white BOÖTES bright brighter Buffham Cassini centre cleft clouds colour comet Cor Caroli curious dark spots Dawes detected diameter disc distance Donati's comet Dorpat Double Stars dusky Earth edge equatorial eye-piece faint field focus globe grey Herschel Huggins instruments interior Jupiter larger Lassell libration light lilac limb luminous lunar MARE SMYTHII Mars minute craters Moon motion mountains naked eye nearly Nebula noticed nucleus object object-glass observers occasionally orange orbit pair pale white pale yellow peak penumbra perceived phænomenon photosphere plain planet probably proper motion reflector region remarkable Right Ascension ring rotation round satellites Saturn Schm Schr Schröter Schwabe Secchi seen shadow shew shewn side smaller Smyth solar sometimes spec streaks Struve surface tail traces Venus VIIIh visible wall XIVh xIxh yellowish
Popular passages
Page 54 - Power 160; the field of view 19' in diameter, and angular subtense" (or apparent extent), " 53^, is perfectly full of brilliant stars, unusually equal in magnitude and distribution over the whole area. Nothing but a sight of the object itself can convey an adequate idea of its exquisite beauty.