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| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
| North American Nebula |
| bright diffuse nebula in the northern constellation Cygnus about 1000 light-years away; cataloged as NGC 7000. It has a configuration resembling parts of Canada and the United States (including the Gulf of Mexico), Mexico, and Central America. |
| The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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