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Extragalactic Nebulae Close to the Galactic Plane
1956
Publications of the Astronomical Society of the Pacific
In 1954 Shane and Wirtanen described the density distribution for extragalactic nebulae counted in their Area III, extending from Ô = -20° to -f-20° and from a = 12 h to 18 11 . 1 The results were given in their Figure 2 . In this figure are also plotted a number of objects which, on the plates of the 20-inch Carnegie astrograph of the Lick Observatory, appeared very much like extragalactic nebulae, but which were found close to the galactic plane in the so-called zone of avoidance. Similar
doi:10.1086/126966
fatcat:sukrjn5uivfnhbdurg5qacyxti