The Stars: A Study of the Universe |
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Page 57
... temperature , and the substances of which they are composed . In this manner it is possible , by a study of the spectrum of a body , to reach certain inferences respecting its constitution . trum . In order that such a study should lead ...
... temperature , and the substances of which they are composed . In this manner it is possible , by a study of the spectrum of a body , to reach certain inferences respecting its constitution . trum . In order that such a study should lead ...
Page 60
... temperature inside and out , give a continuous spectrum , without any dark lines . But the laws of temperature in such a mass show that it will be cooler at the surface than in the interior . This cooler envelope will absorb the rays ...
... temperature inside and out , give a continuous spectrum , without any dark lines . But the laws of temperature in such a mass show that it will be cooler at the surface than in the interior . This cooler envelope will absorb the rays ...
Page 87
... temperature of the apparatus , which alters the re- fracting power of the prisms . This difficulty was obviated by protecting the apparatus from such changes . With this great increase in photographic power and time of exposure it is ...
... temperature of the apparatus , which alters the re- fracting power of the prisms . This difficulty was obviated by protecting the apparatus from such changes . With this great increase in photographic power and time of exposure it is ...
Page 131
... temperature higher than that of the stellar photosphere from which the light forming the other spectrum emanated . Mr. Huggins compared the spectrum of the star with that of hydrogen . It seemed quite apparent that two of the brighter ...
... temperature higher than that of the stellar photosphere from which the light forming the other spectrum emanated . Mr. Huggins compared the spectrum of the star with that of hydrogen . It seemed quite apparent that two of the brighter ...
Page 147
... temperatures of day and night upon the air and the instrument quite masks the parallax in all ordinary cases . After several at- tempts with the finest instruments , handled with the utmost skill , to determine stellar parallax from the ...
... temperatures of day and night upon the air and the instrument quite masks the parallax in all ordinary cases . After several at- tempts with the finest instruments , handled with the utmost skill , to determine stellar parallax from the ...
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Common terms and phrases
actual Algol apical motion appear 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 plates position proper motion question R. A. Dec radial motion radius 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 tude variable stars variation velocity visible wave-length zone
Popular passages
Page 264 - To God's eternal house direct the way ; A broad and ample road, whose dust is gold, And pavement stars, as stars to thee appear, Seen in the galaxy, that milky way Which nightly, as a circling zone, thou seest Powder'd with stars.
Page 38 - Canst thou bind the sweet influences of Pleiades, or loose the bands of Orion? Canst thou bring forth Mazzaroth in his season? or canst thou guide Arcturus with his sons?
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 28 - 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 pleased : now glowed the firmament With living sapphires : Hesperus, that led The starry host, rode brightest, till the moon, Rising in clouded majesty, at length, Apparent queen, unveiled her peerless light, And o'er the dark her silver mantle threw.
Page 226 - Tis ours to trace him only in our own. He, who thro' vast immensity can pierce, See worlds on worlds compose one universe, Observe how system into system runs, What other planets circle other suns, What vary'd Being peoples ev'ry star, May tell why Heav'n has made us as we are.
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...
Page 178 - There is one phenomenon among the fixed stars worthy of mention which, so far as I know, has hitherto been noticed by no one, and indeed cannot be well observed except with large telescopes. In the sword of Orion are three stars quite close together. In 1656, as I chanced to be viewing the middle one of these with the telescope, instead of a single star, twelve showed themselves (a not uncommon circumstance). Three of these almost touched each other, and, with four others, shone through a nebula,...
Page 56 - Almighty's mysteries to read In the large volumes of the skies. For the bright firmament Shoots forth no flame So silent, but is eloquent In speaking the Creator's name. No unregarded star Contracts its light Into so small a character, Removed far from our human sight, But if we steadfast look, We shall discern In it, as in some holy book, How man may heavenly knowledge learn.