The Stars: A Study of the Universe |
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Page 38
... centre of the earth and coinciding with its equator , to extend out so as to intersect the celestial sphere . The line of intersection will be a great circle of the celes- tial sphere , called the celestial equator . The axis of the ...
... centre of the earth and coinciding with its equator , to extend out so as to intersect the celestial sphere . The line of intersection will be a great circle of the celes- tial sphere , called the celestial equator . The axis of the ...
Page 78
... centre , each planet continually de- scribing the same orbit , while the various planets have different velocities . Around several of the planets revolve one or more satellites . Were civilised men ephemeral , observing the planets and ...
... centre , each planet continually de- scribing the same orbit , while the various planets have different velocities . Around several of the planets revolve one or more satellites . Were civilised men ephemeral , observing the planets and ...
Page 79
... centre of its own while all these systems are in revolution around a single centre ? This thought has been entertained by more than one contemplative astronomer . Lambert's magnifi- cent conception of system upon system will be ...
... centre of its own while all these systems are in revolution around a single centre ? This thought has been entertained by more than one contemplative astronomer . Lambert's magnifi- cent conception of system upon system will be ...
Page 88
... centre of gravity , to be at rest , and then determining the motion of the sun with respect to this centre . Here we encounter the diffi- culty that we cannot make any absolute determina- tion of the position of such a centre . The ...
... centre of gravity , to be at rest , and then determining the motion of the sun with respect to this centre . Here we encounter the diffi- culty that we cannot make any absolute determina- tion of the position of such a centre . The ...
Page 93
... centre of mass we might assume to be at rest . Here we meet the difficulty that the stars measured for parallax are generally those having a proper motion away from the apex . This will make the result derived in this way too large . A ...
... centre of mass we might assume to be at rest . Here we meet the difficulty that the stars measured for parallax are generally those having a proper motion away from the apex . This will make the result derived in this way too large . A ...
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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...