The System of the Stars |
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Page xix
... DISTRIBUTION OF 934 STARS WITHIN 1 ° OF THE POLE , SHOWING THE RATIO OF NUMBERS TO SPACE FOR EACH HALF MAGNITUDE • . 383 ADDENDA Supply at p . 3 , note , line ILLUSTRATIONS xix 279 281 99 79 FIGURE WOODCUTS IN TEXT FIGURE.
... DISTRIBUTION OF 934 STARS WITHIN 1 ° OF THE POLE , SHOWING THE RATIO OF NUMBERS TO SPACE FOR EACH HALF MAGNITUDE • . 383 ADDENDA Supply at p . 3 , note , line ILLUSTRATIONS xix 279 281 99 79 FIGURE WOODCUTS IN TEXT FIGURE.
Page 6
... half inches across , Argelander registered 324,189 down to 9 mag- nitude , all in the northern hemisphere , enlarged by only a very narrow zone ( one degree wide ) of the southern . The work Observatory , vol . xii . p . 194 . 1 Astr ...
... half inches across , Argelander registered 324,189 down to 9 mag- nitude , all in the northern hemisphere , enlarged by only a very narrow zone ( one degree wide ) of the southern . The work Observatory , vol . xii . p . 194 . 1 Astr ...
Page 10
... half - dozen objects , however — those in Orion and Andromeda— were genuine nebulæ ; the rest when viewed with better instru- ments than his six - foot tube , ' proved to be magnificent star clusters . This small beginning of knowledge ...
... half - dozen objects , however — those in Orion and Andromeda— were genuine nebulæ ; the rest when viewed with better instru- ments than his six - foot tube , ' proved to be magnificent star clusters . This small beginning of knowledge ...
Page 16
... half inches . A similar instrument , however , erected at the Royal Observatory , Cape of Good Hope , nearly forty years later , is but slightly inferior in size , and is in other re- spects considerably its superior . Dr. Elkin , at ...
... half inches . A similar instrument , however , erected at the Royal Observatory , Cape of Good Hope , nearly forty years later , is but slightly inferior in size , and is in other re- spects considerably its superior . Dr. Elkin , at ...
Page 18
... half of the slit , through the other half of which the stellar rays are admitted . Both sets then traverse the same prisms , and form strictly comparable spectra side by side in the same field of view . Lines common to both can thus ...
... half of the slit , through the other half of which the stellar rays are admitted . Both sets then traverse the same prisms , and form strictly comparable spectra side by side in the same field of view . Lines common to both can thus ...
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Common terms and phrases
61 Cygni 70 Ophiuchi absorption Aldebaran Algol Andromeda Andromeda nebula appear Arcturus Argûs Astr astronomy atmospheric bands Betelgeux blue bodies bright lines brilliant Cassiopeia Catalogue centre century cluster colour comets condensation Cygni dark detected distance double stars effect extent faint galactic Harvard heavens heliometer hence Huggins hydrogen hydrogen lines Ibid interval less light Lockyer luminous lustre Lyræ magnitude star mass maximum measured ment miles Milky Mira Monthly Notices movements nearly nebula ninth magnitude objects observations Observatory Ophiuchus orbit Orion Orion nebula pair parallax peculiarities period Phil photographic photosphere planetary plates Pleiades present Professor proper motion rays red stars refractor remarkable remote satellite Schjellerup seems sidereal Sir John Herschel Sirian Sirius sixth magnitude small stars solar southern space spectra spectroscopic spectrum stellar Struve sun's telescope tion Trans variable stars velocity visible visual Vogel yellow
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