Celestial objects for common telescopesLongmans Green, 1873 |
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Page 2
... figure ' ( i.e. irregular curvature ) , or bad com- was lost in them . The silver - on - glass specula , invented by Foucault and Steinheil , and now manufactured in England , take their place between the metal Newtonian and the ...
... figure ' ( i.e. irregular curvature ) , or bad com- was lost in them . The silver - on - glass specula , invented by Foucault and Steinheil , and now manufactured in England , take their place between the metal Newtonian and the ...
Page 4
... figures on a watch - face , or a minute white circle on a black ground , or a thermometer bulb in the sunshine , placed as far off as is convenient . An achromatic , notwithstanding the derivation of its name , will shew colour under ...
... figures on a watch - face , or a minute white circle on a black ground , or a thermometer bulb in the sunshine , placed as far off as is convenient . An achromatic , notwithstanding the derivation of its name , will shew colour under ...
Page 6
... figures are not , however , always to be depended upon , and never , if the eye - piece was made for an instrument of a different focal length . The celebrated Short exaggerated the powers of his reflectors : and those of the great ...
... figures are not , however , always to be depended upon , and never , if the eye - piece was made for an instrument of a different focal length . The celebrated Short exaggerated the powers of his reflectors : and those of the great ...
Page 41
... figure , density , and regularity of path , it seemed utterly unlike floating scoria . In short , its progress over the Sun's disc seems to have exceeded that of Venus in transit . There are two instances , if not three , of comets seen ...
... figure , density , and regularity of path , it seemed utterly unlike floating scoria . In short , its progress over the Sun's disc seems to have exceeded that of Venus in transit . There are two instances , if not three , of comets seen ...
Page 49
... figures accordingly . But Schröter's observations at the end of the last century are far more trustworthy . With several fine reflectors and a very good achromatic , he and others found the boundary sometimes slightly jagged , sometimes ...
... figures accordingly . But Schröter's observations at the end of the last century are far more trustworthy . With several fine reflectors and a very good achromatic , he and others found the boundary sometimes slightly jagged , sometimes ...
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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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