Celestial objects for common telescopesLongmans Green, 1873 |
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Page 4
... given night being fine enough for such a purpose , and a fair judgment may be made by day from the 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 ...
... given night being fine enough for such a purpose , and a fair judgment may be made by day from the 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 ...
Page 7
... given by Dallmeyer and Alvan Clark . Reflectors some- what surpass achromatics in this respect , as theoretically they ought to do : but they are apt to be more troubled by rings and scattered light . The best telescopes of either kind ...
... given by Dallmeyer and Alvan Clark . Reflectors some- what surpass achromatics in this respect , as theoretically they ought to do : but they are apt to be more troubled by rings and scattered light . The best telescopes of either kind ...
Page 18
... given to the material uni- verse — so amazing a disclosure as has thus been permitted to man , of the vastness of his Maker's dominion - can hardly be ascribed to blind accident or human contrivance : in thus employing Galileo's ...
... given to the material uni- verse — so amazing a disclosure as has thus been permitted to man , of the vastness of his Maker's dominion - can hardly be ascribed to blind accident or human contrivance : in thus employing Galileo's ...
Page 22
... given by a screen - glass . In either mode of observation , if an achromatic is employed , it is an excellent plan to shade the face in the one case , or the screen in the other , by a large piece of pasteboard with a hole in it ...
... given by a screen - glass . In either mode of observation , if an achromatic is employed , it is an excellent plan to shade the face in the one case , or the screen in the other , by a large piece of pasteboard with a hole in it ...
Page 31
... given some indications as to its temperature , are among the most surprising of modern astronomical discoveries , and stand on evidence which seems incontrovertible ; * but they still leave much to be explained by future investigation ...
... given some indications as to its temperature , are among the most surprising of modern astronomical discoveries , and stand on evidence which seems incontrovertible ; * but they still leave much to be explained by future investigation ...
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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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