NGC 40, The Bow-tie Nebula (Steven Bellavia)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: NGC 40

NGC 40, The Bow-tie Nebula

NGC 40, the Bow-Tie Nebula, 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. Radiation from the star causes the shed outer layer to heat to about 10,000 degrees Celsius,NGC 40, the Bow-Tie Nebula, 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. Radiation from the star causes the shed outer layer to heat to about 10,000 degrees Celsius,[ and is about one light-year across. 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.

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Planetary Nebulae

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Astrometry.net job	2194408
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NGC 40, The Bow-tie Nebula

NGC 40, The Bow-tie Nebula

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