Celestial objects for common telescopesLongmans Green, 1873 |
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... Secchi Dawes Farke Bay Dawes Cont : Majaler Cont Browning Lanit 60 20 30 60 De Ambre Laplace North Polar Ice 180 120 ° 60 ° 0 ° 300 240 180 Celestial objects for common telescopes Thomas William Webb CELESTIAL OBJECTS Front Cover.
... Secchi Dawes Farke Bay Dawes Cont : Majaler Cont Browning Lanit 60 20 30 60 De Ambre Laplace North Polar Ice 180 120 ° 60 ° 0 ° 300 240 180 Celestial objects for common telescopes Thomas William Webb CELESTIAL OBJECTS Front Cover.
Page 16
... Secchi has found the detail of the Great Nebula in Orion much more visible in moonlight . † A wadded dressing - gown has been strongly recommended . 9. In examining faint objects , do not prepare the 16 THE INSTRUMENT AND THE OBSERVER .
... Secchi has found the detail of the Great Nebula in Orion much more visible in moonlight . † A wadded dressing - gown has been strongly recommended . 9. In examining faint objects , do not prepare the 16 THE INSTRUMENT AND THE OBSERVER .
Page 20
... Secchi's observations at Rome seeming to show that the visibility of very delicate details may depend on the tint . In the absence of a proper screen , smoked glass may be used : it is said to intercept heat very perfectly , by Prince ...
... Secchi's observations at Rome seeming to show that the visibility of very delicate details may depend on the tint . In the absence of a proper screen , smoked glass may be used : it is said to intercept heat very perfectly , by Prince ...
Page 23
... Secchi remarks , the creeping of a very dense luminous mate- rial over an extremely rough surface ; and a surrounding ' penumbra ' ( the ' umbra ' of former days ) , a fainter shade with an equally definite , but in general less angular ...
... Secchi remarks , the creeping of a very dense luminous mate- rial over an extremely rough surface ; and a surrounding ' penumbra ' ( the ' umbra ' of former days ) , a fainter shade with an equally definite , but in general less angular ...
Page 24
... Secchi , who concurs in this discovery , finds that holes in a glazed visiting - card ( which may be burnt with a red - hot needle ) , answer well : the card , however , should be placed a little way from the focus , or the edges of the ...
... Secchi , who concurs in this discovery , finds that holes in a glazed visiting - card ( which may be burnt with a red - hot needle ) , answer well : the card , however , should be placed a little way from the focus , or the edges of the ...
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Common terms and phrases
achr achromatic aperture astronomers atmosphere beautiful Binary bluish Boöt bright brighter brilliant Buffham centre Ceph Clusters colour comet constellation craters Crown 8vo curious dark Dawes diameter disc Double Stars Drac dusky Earth Edition eye-piece faint field flushed white grey Herc Herschel Huggins interior JOHN TYNDALL Jupiter Lassell libration light lilac limb luminous lunar minute stars Moon naked eye nearly Nebulæ noticed nucleus object object-glass observers orange pair pale blue pale white pale yellow photosphere Pisc planet Post 8vo proper motion Red Star reflector region remarkable revised Right Ascension ring ruddy satellites Schm Schr Schröter Schwabe Secchi seen shadow shew side smalt solar sometimes spec spots streaks Taur telescope topaz Triple visible vols Woodcuts XIVh xIxh xvih XVIII yellowish
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