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| Description: Some Shapes of Planetary Nebulae The outer shells of dying low-mass stars are ejected in a wonderful variety of patterns. (a) An exceptionally spherical remnant, this shell of expanding gas, in the globular cluster M15 in the constellation Pegasus,is about 7000 ly (2150 pc) away from Earth. Picture Stats: Views: 554 Filesize: 241.26kB Height: 900 Width: 985 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18602 |