Source: Busch, Wilhelm: Sämtliche Briefe. Kommentierte Ausgabe in zwei Bänden, Band I: Briefe 1841 bis 1892, Band II: Briefe 1893 bis 1908, hg. v. Friedrich Bohne, Hannover:...
We have measured vertical and radial stellar population gradients in NGC 891. We compare these gradients to those known for the Milky Way from studies of resolved stars. Optical...