The Stars: A Study of the Universe |
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Page vii
... Spectroscope - The Lick and Harvard Observatories PAGE I CHAPTER II . MAGNITUDES OF THE STARS . The Brightness of a Star Depends on Distance - Ancient System of Mag- nitudes Modern Conception of Magnitude - Effect of Color on Magnitude ...
... Spectroscope - The Lick and Harvard Observatories PAGE I CHAPTER II . MAGNITUDES OF THE STARS . The Brightness of a Star Depends on Distance - Ancient System of Mag- nitudes Modern Conception of Magnitude - Effect of Color on Magnitude ...
Page 9
... spectroscope to the study of the heavenly bodies was made within . the memory of the present generation , its results have been only less epoch - making than those of the telescope . The two in- struments differ in that the one ...
... spectroscope to the study of the heavenly bodies was made within . the memory of the present generation , its results have been only less epoch - making than those of the telescope . The two in- struments differ in that the one ...
Page 11
... spectroscope . The dark bodies , planets we may call them , which are re- volving round the stars , must be for ever invisible in any telescope that it would be possible to construct . They would remain invisible if the power of the in ...
... spectroscope . The dark bodies , planets we may call them , which are re- volving round the stars , must be for ever invisible in any telescope that it would be possible to construct . They would remain invisible if the power of the in ...
Page 12
... spectroscope , but the most powerful telescope at command . Ten years ago the most powerful telescope in the world was at the Lick Observatory . A few years later Mr. D. O. Mills put at its eye end the best spectrograph that human art ...
... spectroscope , but the most powerful telescope at command . Ten years ago the most powerful telescope in the world was at the Lick Observatory . A few years later Mr. D. O. Mills put at its eye end the best spectrograph that human art ...
Page 13
... spectroscope . The more or less eccentric orbits of these bodies are being determined . The final conclusion from all his work is that isolated stars may be the exception rather than the rule ; that pos- sibly a great majority at least ...
... spectroscope . The more or less eccentric orbits of these bodies are being determined . The final conclusion from all his work is that isolated stars may be the exception rather than the rule ; that pos- sibly a great majority at least ...
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Common terms and phrases
actual Algol apical motion appear Aquila astronomers average Beta Lyræ binary systems body bright lines brighter stars brightest brilliancy catalogue celestial sphere centre century chapter cluster colour components conclusion constellation dark lines density determined direction distance double stars earth eclipses emitted equal Eta Aquila fact faint fainter follows galaxy greater Harvard Observatory heavens Herschel hydrogen hydrogen lines increase Kapteyn latter less Lick Observatory limit lucid stars mass measured Milky naked eye nearly nebula number of stars observations Observatory orbit Orion parallactic motion parallax period photographic Pickering planet pole position proper motion question R. A. Dec radial motion ratio remarkable revolving round right ascension seems seen Sirius sixth magnitude solar apex space spectra spectroscope spectroscopic binary spectrum square degrees star-density stellar supposed surface telescope temperature tion tude UNIVERS universe variable stars variation velocity visible wave-length zone
Popular passages
Page 284 - How charming is divine Philosophy! Not harsh and crabbed, as dull fools suppose, But musical as is Apollo's lute, And a perpetual feast of nectared sweets, Where no crude surfeit reigns.
Page 224 - Tis ours to trace him only in our own. He, who through vast immensity can pierce, See worlds on worlds compose one universe, Observe how system into system runs, What other planets circle other suns, What varied being peoples every star, May tell why Heaven has made us as we are.
Page 333 - The book is cleverly written and is one of the best works of its kind ever put before the public. It will be interesting to all readers, and especially to those interested in the study of science.
Page 26 - Now came still evening on, and twilight grey Had in her sober livery all things clad; Silence accompanied; for beast and bird, They to their grassy couch, these to their nests Were slunk, all but the wakeful nightingale ; She all night long her amorous descant sung , Silence was...
Page 121 - It may be glorious to write Thoughts that shall glad the two or three High souls, like those far stars that come in sight Once in a century ; — But better far it is to speak One simple word, which now and then Shall waken their free nature in the weak And friendless sons of men...
Page 262 - To God's eternal house direct the way A broad and ample road, whose dust is gold, And pavement stars...