The Stars: A Study of the Universe |
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Page 57
A Study of the Universe Simon Newcomb. of an infinite number of wave - lengths , or , in simpler language , of an infinite number of tints of colour , since to every wave - length corresponds a definite tint . Such a spreading out of ...
A Study of the Universe Simon Newcomb. of an infinite number of wave - lengths , or , in simpler language , of an infinite number of tints of colour , since to every wave - length corresponds a definite tint . Such a spreading out of ...
Page 60
... wave - length . When a body , even if gaseous in form , is of such great size and density that light of no colour can pass entirely through it , then the consequent absorption by the body of light of all colours shows that throughout ...
... wave - length . When a body , even if gaseous in form , is of such great size and density that light of no colour can pass entirely through it , then the consequent absorption by the body of light of all colours shows that throughout ...
Page 61
... wave - lengths ; at least we can set no definite limit to the wave - length . These lengths may be expressed in millionths of a millimetre , or , as is now more commonly done , in ten millionths . This measure is sometimes called the ...
... wave - lengths ; at least we can set no definite limit to the wave - length . These lengths may be expressed in millionths of a millimetre , or , as is now more commonly done , in ten millionths . This measure is sometimes called the ...
Page 62
... wave - length we remark that near the brightest part of the spectrum the wave - length is 5000 tenth- metres or 500 millionths of a millimetre , the latter being nearly of our inch . The wave - length in question is therefore about of ...
... wave - length we remark that near the brightest part of the spectrum the wave - length is 5000 tenth- metres or 500 millionths of a millimetre , the latter being nearly of our inch . The wave - length in question is therefore about of ...
Page 63
... wave - length . Thus the line C or Ha may be designated as 6561.7 . Maps or tables of the spectra of the various ... wave - lengths 4000 and 7600 . It is now found that the spectra of most substances vary with the physical condition of ...
... wave - length . Thus the line C or Ha may be designated as 6561.7 . Maps or tables of the spectra of the various ... wave - lengths 4000 and 7600 . It is now found that the spectra of most substances vary with the physical condition of ...
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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...