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 |
À l'intérieur du livre
Résultats 1-5 sur 53
Page 77
... hydrogen line in the Orion nebula and in the planetary nebula N.G.C. 6572 ( G.C. 4390 , or 26 , R. A. = 18h 7m ) ... lines in the same spectra to their normal , or zero - velocity wave- lengths . Knowing their normal wave - lengths , the ...
... hydrogen line in the Orion nebula and in the planetary nebula N.G.C. 6572 ( G.C. 4390 , or 26 , R. A. = 18h 7m ) ... lines in the same spectra to their normal , or zero - velocity wave- lengths . Knowing their normal wave - lengths , the ...
Page 79
... lines on the photographs the 3 - prism combination reduced the exposure times to about one - fifth that required by ... hydrogen and helium tubes , but in the beginning at Santiago the iron are was used , and in a very few cases at Mount ...
... lines on the photographs the 3 - prism combination reduced the exposure times to about one - fifth that required by ... hydrogen and helium tubes , but in the beginning at Santiago the iron are was used , and in a very few cases at Mount ...
Page 80
... lines are sorrespondingly keg . In these cases ces the hellum comparat ... hydrogen was obtained in order to supply the zero reading of the HS line on ... lines , as it was not practicable to see curved allts such that straight spectrum ...
... lines are sorrespondingly keg . In these cases ces the hellum comparat ... hydrogen was obtained in order to supply the zero reading of the HS line on ... lines , as it was not practicable to see curved allts such that straight spectrum ...
Page 82
... lines- provided the lines are monochromatic - there is no difficulty in attaining to probable errors of 0.5 km ... hydrogen lines from the spectrum tube were not finer and sharper " ( p . 199 ) . To anticipate , we may say that ...
... lines- provided the lines are monochromatic - there is no difficulty in attaining to probable errors of 0.5 km ... hydrogen lines from the spectrum tube were not finer and sharper " ( p . 199 ) . To anticipate , we may say that ...
Page 85
... hydrogen lines , in the region photographed . The N , line is very faintly recorded on the last plate , exposure 31.4 hours , and there is a scarcely recognizable though certain trace of N , on the same plate , but N , and N , are not ...
... hydrogen lines , in the region photographed . The N , line is very faintly recorded on the last plate , exposure 31.4 hours , and there is a scarcely recognizable though certain trace of N , on the same plate , but N , and N , are not ...
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