The Stars: A Study of the Universe |
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Page viii
... Parallax First Measures of Parallax- Modern Methods - The Heliometer and Photographic Telescope- Surveys for Parallax PAGE 56 75 94 123 140 CHAPTER X. SYSTEMS OF STARS . Double Stars - Position viii CONTENTS.
... Parallax First Measures of Parallax- Modern Methods - The Heliometer and Photographic Telescope- Surveys for Parallax PAGE 56 75 94 123 140 CHAPTER X. SYSTEMS OF STARS . Double Stars - Position viii CONTENTS.
Page x
... Parallax of the Stars of the Second Magnitude - Motions of the Two Principal Spectral Types of Stars - Kapteyn's Researches - Relation of the Proper Motions to the Solar Motion CHAPTER XX . THE DISTRIBUTION OF THE STARS IN SPACE ...
... Parallax of the Stars of the Second Magnitude - Motions of the Two Principal Spectral Types of Stars - Kapteyn's Researches - Relation of the Proper Motions to the Solar Motion CHAPTER XX . THE DISTRIBUTION OF THE STARS IN SPACE ...
Page 5
... parallax by observations upon Venus and Mars about the time of their nearest approach to the earth . As these observations would take but a small part of his time , Gilliss determined to take with him instruments for determining the ...
... parallax by observations upon Venus and Mars about the time of their nearest approach to the earth . As these observations would take but a small part of his time , Gilliss determined to take with him instruments for determining the ...
Page 27
... parallax are as follows : Sirius ; Distance 100,000 : Parallax = 2 " .06 66 66 Mag . I 302,000 : o " .68 66 66 66 2 479,000 : o " .43 66 66 66 66 66 66 34 56 759,000 : o " .27 66 66 1,202,000 : o " .17 66 66 1,906,000 : o " .II 66 66 0 ...
... parallax are as follows : Sirius ; Distance 100,000 : Parallax = 2 " .06 66 66 Mag . I 302,000 : o " .68 66 66 66 2 479,000 : o " .43 66 66 66 66 66 66 34 56 759,000 : o " .27 66 66 1,202,000 : o " .17 66 66 1,906,000 : o " .II 66 66 0 ...
Page 92
... parallax . Regarding any star 90 ° from the apex of the solar motion as in a state of absolute rest , we have the obvious rule that the quotient of its parallactic motion during any period , say a century , divided by its parallax ...
... parallax . Regarding any star 90 ° from the apex of the solar motion as in a state of absolute rest , we have the obvious rule that the quotient of its parallactic motion during any period , say a century , divided by its parallax ...
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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...