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 100
Page 12
... nebulae appear as textureless disks or ovals solely because of their small size . Were the Great Nebula in Andromeda situated five hundred times as far away as at present , it would appear as a structureless oval about 0 : 2 long , with ...
... nebulae appear as textureless disks or ovals solely because of their small size . Were the Great Nebula in Andromeda situated five hundred times as far away as at present , it would appear as a structureless oval about 0 : 2 long , with ...
Page 13
... small nebulae occurring in all the regions covered by this list , rejecting thirty - one regions where the exposure ... nebulae , and two to three hours is better . Very little is gained by length- ening the exposure beyond three hours ...
... small nebulae occurring in all the regions covered by this list , rejecting thirty - one regions where the exposure ... nebulae , and two to three hours is better . Very little is gained by length- ening the exposure beyond three hours ...
Page 14
... nebulae to be 778,000 . Because of the fact that the faintest and smallest ... small spirals . This objection was urged by Fath ( loc . cit . ) in ... Nebulae were Counted . Plane is shown by dotted lines . figure 1 the 439 regions in ...
... nebulae to be 778,000 . Because of the fact that the faintest and smallest ... small spirals . This objection was urged by Fath ( loc . cit . ) in ... Nebulae were Counted . Plane is shown by dotted lines . figure 1 the 439 regions in ...
Page 15
... nebulae found in 322 regions , or 241.5 square degrees , these would correspond to 469,000 nebulae , a total for the entire sky of 674,000 . Any objection depending upon the effects of a marked concentration of the small nebulae in the ...
... nebulae found in 322 regions , or 241.5 square degrees , these would correspond to 469,000 nebulae , a total for the entire sky of 674,000 . Any objection depending upon the effects of a marked concentration of the small nebulae in the ...
Page 16
... 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 ° 30 ' shows 304 nebulae , while ...
... 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 ° 30 ' shows 304 nebulae , while ...
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