Studies of the Nebulae: Made at the Lick Observatory, University of California, at Mount Hamilton, California, and Santiago, Chile, Volume 13University of California Press, 1918 - 268 pages |
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Page 13
... region . The greatest number found on a single plate was 304 ( checked by duplicate plate ) ; the central portion of this remarkable region is reproduced in figure 3. Twenty - six other regions were counted as well ; these are plates of ...
... region . The greatest number found on a single plate was 304 ( checked by duplicate plate ) ; the central portion of this remarkable region is reproduced in figure 3. Twenty - six other regions were counted as well ; these are plates of ...
Page 14
... region . In order to test this objection , as far as it may be applied to the present counts , I have plotted in " 12 12 Y S S The Position of the Galactic Fig . 1. Distribution of Regions on which Small Nebulae were Counted . Plane is ...
... region . In order to test this objection , as far as it may be applied to the present counts , I have plotted in " 12 12 Y S S The Position of the Galactic Fig . 1. Distribution of Regions on which Small Nebulae were Counted . Plane is ...
Page 16
... region . It is certain that the small nebulae fre- quently show a gregarious tendency ; occasionally one - half of a plate will record many small spirals while the other half records very few ; the remarkable region at 12h 55m , + 28 ...
... region . It is certain that the small nebulae fre- quently show a gregarious tendency ; occasionally one - half of a plate will record many small spirals while the other half records very few ; the remarkable region at 12h 55m , + 28 ...
Page 18
... region is unusually thick with small nebulae and nebulous stars : several of these are small spirals . N. G. C. 67 , 69-72 , and 75 are all small nebulae or nebulous stars . 98 s.n. A small area of diffuse nebulosity about 3 ' x 2 ...
... region is unusually thick with small nebulae and nebulous stars : several of these are small spirals . N. G. C. 67 , 69-72 , and 75 are all small nebulae or nebulous stars . 98 s.n. A small area of diffuse nebulosity about 3 ' x 2 ...
Page 19
... region , but no trace of II 1613 in an exposure of 1h 44m . 33 s.n. Rather faint , considerably elongated spiral 15 in length ; nucleus well defined . Round ; 13 in diameter ; quite bright . The nucleus is stellar ; no spiral struc ...
... region , but no trace of II 1613 in an exposure of 1h 44m . 33 s.n. Rather faint , considerably elongated spiral 15 in length ; nucleus well defined . Round ; 13 in diameter ; quite bright . The nucleus is stellar ; no spiral struc ...
Autres éditions - Tout afficher
Studies of the Nebulae: Made at the Lick Observatory, University ..., Volume 13 Lick Observatory,Joseph Haines Moore Affichage du livre entier - 1918 |
Expressions et termes fréquents
appears bright bands bright lines brighter Campbell N₁ central portion central star continuous spectrum dark lane DETAILS OF OBSERVATION diameter diffuse nebulosity disk edge elongated exposure faint fainter figure g slitless Greater Magellanic Cloud H N₁ N₂ Haynes hydrogen hydrogen lines inclination km./sec Lick Obs LICK OBSERVATORY line Ia long Hẞ M. T. Exp major axis minor axis Miss Hobe N Miss Hobe N₁ moderately bright Moore Miss Hobe Moore N Moore N₁ N₂ N₁ N₂ Hẞ N₂ HB N₂ Hẞ Hy nearly round nucleus band object Orion nebula photographic planetary nebulae radial velocity region relative intensities ring Ring Nebula rotation s.n. Planetary Scott N Scott N₁ Sept Slit long small nebulae spectra spectrograms spiral nebulae spiral structure star of magn stellar condensations stellar nucleus ultra-violet under-exposed wave-lengths whorls Wolf-Rayet Wolf-Rayet stars Ηβ Ηγ