The Stars: A Study of the Universe |
From inside the book
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Page 3
... seen by a keen eye under favourable conditions are so near the limit of visibility as to escape ordinary notice . Moreover , those which we see are but an in- significant fraction of the number revealed by the telescope . The more we ...
... seen by a keen eye under favourable conditions are so near the limit of visibility as to escape ordinary notice . Moreover , those which we see are but an in- significant fraction of the number revealed by the telescope . The more we ...
Page 4
... seen south of the equator . Various enterprises and establishments had therefore contributed to our knowledge of the region in question . As far back as 1677 , during a voyage to St. Helena , Halley cata- logued the brighter stars in ...
... seen south of the equator . Various enterprises and establishments had therefore contributed to our knowledge of the region in question . As far back as 1677 , during a voyage to St. Helena , Halley cata- logued the brighter stars in ...
Page 8
... seen , though in an imperfect way , in subsequent chapters . Not satisfied with the northern hemisphere , it has established a branch at Arequipa , Peru , in which its methods of observation . and research are extended to the south ...
... seen , though in an imperfect way , in subsequent chapters . Not satisfied with the northern hemisphere , it has established a branch at Arequipa , Peru , in which its methods of observation . and research are extended to the south ...
Page 15
... seen by the figure , where S represents the position of a star , B B A B regarded as a luminous point , while A and B B B B are screens placed at such distances that each will re- ceive the same amount of light from the star . If the ...
... seen by the figure , where S represents the position of a star , B B A B regarded as a luminous point , while A and B B B B are screens placed at such distances that each will re- ceive the same amount of light from the star . If the ...
Page 17
... seen on any clear night of the year in our latitude . Stars of the third magni- tude are so numerous that it is difficult to select any one for comparison . The brightest star of the Plei- ades is really of this magnitude , but it does ...
... seen on any clear night of the year in our latitude . Stars of the third magni- tude are so numerous that it is difficult to select any one for comparison . The brightest star of the Plei- ades is really of this magnitude , but it does ...
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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...