NGC 40

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Template:Infobox planetary nebula

NGC 40 (also known as the Bow-Tie Nebula and Caldwell 2) is a planetary nebula discovered by William Herschel on November 25, 1788, and is composed of hot gas around a dying star. The star has ejected its outer layer which has left behind a smaller, hot star with a temperature on the surface of about 50,000 degrees Celsius.[1] Radiation from the star causes the shed outer layer to heat to about 10,000 degrees Celsius,[1] and is about one light-year across.[1] About 30,000 years from now, scientists theorize that NGC 40 will fade away, leaving only a white dwarf star approximately the size of Earth.[1]

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  1. 1.0 1.1 1.2 1.3 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).


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