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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Résultats 11-15 sur 99
Page 81
... lines at the points v , O , and w . In practice the appearance is somewhat as in figure 2. The irregular distribution of silver grains requires the observer consciously or unconsciously to bisect a considerable ... BRIGHT - LINE NEBULAE 81.
... lines at the points v , O , and w . In practice the appearance is somewhat as in figure 2. The irregular distribution of silver grains requires the observer consciously or unconsciously to bisect a considerable ... BRIGHT - LINE NEBULAE 81.
Page 82
... bright enough to give fully exposed lines- provided the lines are monochromatic - there is no difficulty in attaining to probable errors of 0.5 km . , or less , for single observations , even though the exposures may run up to 10 or 20 ...
... bright enough to give fully exposed lines- provided the lines are monochromatic - there is no difficulty in attaining to probable errors of 0.5 km . , or less , for single observations , even though the exposures may run up to 10 or 20 ...
Page 83
... lines were observed by Keeler to be fine and sharp in the spectrum of the nebulous envelope , but fuzzy and considerably broadened in the nucleus ( p . 209 ) . A similar observation was made by Keeler for N.G.C. ... BRIGHT - LINE NEBULAE 883.
... lines were observed by Keeler to be fine and sharp in the spectrum of the nebulous envelope , but fuzzy and considerably broadened in the nucleus ( p . 209 ) . A similar observation was made by Keeler for N.G.C. ... BRIGHT - LINE NEBULAE 883.
Page 84
... lines to the zero direction should be reversed for the two positions of the slit . If the ellipticity of the nebular ... bright lines measured are indicated in the fifth column . The radial velocities obtained by individual observers are ...
... lines to the zero direction should be reversed for the two positions of the slit . If the ellipticity of the nebular ... bright lines measured are indicated in the fifth column . The radial velocities obtained by individual observers are ...
Page 85
... lines , the width was 0.038 mm . We have neglected to secure accurate data from Chile as to the precise slit widths employed , but they did not differ greatly from the slit widths at Mount Hamilton . The last ... BRIGHT - LINE NEBULAE 85.
... lines , the width was 0.038 mm . We have neglected to secure accurate data from Chile as to the precise slit widths employed , but they did not differ greatly from the slit widths at Mount Hamilton . The last ... BRIGHT - LINE NEBULAE 85.
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