Celestial Objects for Common Telescopes |
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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.