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NGC 2359

Top left is NE. Image width is about 17 arc min
Image 1979-2002, Anglo-Australian Observatory, photograph by David Malin.

 

 

 

This image shows ring nebula NGC2359 with the WN4 central star HD56925.  Such nebula are generally believed to arise from the interaction of the stellar wind with the interstellar medium, or with earlier stellar ejecta.