< Portal:Astronomy < Picture
George Abell is well known for compiling a catalogue of galaxy clusters but also catalogued planetary nebulae with low surface brightnesses. Abell 39 is extremely spherical in shape, although a mystery for astronomers is that the central star does not lie exactly at the centre of the sphere, but is displaced by about 0.1 light years.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.