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actual Algol apical motion appear Aquilae astronomers average Beta Lyrae Beta Lyrae type 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 Aquilae fact faint fainter follows galactic region galaxy greater Harvard Observatory heavens Herschel hydrogen lines increase Kapteyn latter less Lick Observatory limit lucid stars mass measured Milky naked eye nearly nebulae number of stars º º observations orbit Orion parallactic motion parallax period photographic Pickering planet position proper motion question radial motion ratio remarkable revolving round right ascension seems seen Sirius sixth magnitude solar apex solar motion space spectra spectroscope spectroscopic binary spectrum square degrees star-density stellar supposed surface telescope temperature tion variable stars variation velocity visible wave-length zone
Page 286 - 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 226 - 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 28 - 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 123 - 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...