 | 1918 - عدد الصفحات: 392
...Nebulosities NGC I ~'9, northeast of y Camiiapeiac. Fig. 5. Dark Nebula near NGC I 434; 5" 2fi'"0, Fig. 7. The Spiral Nebula NGC 5236. PART II A STUDY...very faint nebulae. It is the purpose of this paper to show that the occurrence of such dark bands in the spiral nebulae is a relatively common phenomenon.... | |
 | Astronomical Society of the Pacific - 1919 - عدد الصفحات: 776
...spiral nebulae seen edgewise or nearly so, show a dark lane running lengthwise of the nebular image, an appearance generally explained as due to a band of absorbing or occulting matter. It is not so well known that many spirals viewed obliquely with reference to their principal planes... | |
 | Astronomical Society of the Pacific - 1917 - عدد الصفحات: 806
...knowledge that certain spiral nebulae seen edgewise show a dark lane running down the length of the spiral, generally explained as due to a band of absorbing...occulting matter. The Crossley photographs at present include several hundred spirals, and show that this phenomenon ba very common one. Over sixty spirals... | |
 | Astronomical Society of the Pacific - 1916 - عدد الصفحات: 654
...knowledge that certain spiral nebulae seen edgewise show a dark lane running down the length of the spiral, generally explained as due to a band of absorbing...occulting matter. The Crossley photographs at present include several hundred spirals, and show that this phenomenon is a very common one. Over sixty spirals... | |
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It has long been a matter of common knowledge that certain spiral nebulae seen edgewise show a dark lane running down the length of the spiral, an appearance generally explained as due to a band of absorbing or occulting matter. 