Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888
NGC 6888 Crescent nebula and Soap Bubble, Luca Dinoi
NGC 6888 Crescent nebula and Soap Bubble
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NGC 6888 Crescent nebula and Soap Bubble

NGC 6888 Crescent nebula and Soap Bubble, Luca Dinoi
NGC 6888 Crescent nebula and Soap Bubble
Powered byPixInsight

NGC 6888 Crescent nebula and Soap Bubble

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Description

NGC 6888 (also known as the Crescent Nebula or C 27) is a diffuse nebula visible in the southern part of the constellation Cygnus. It is a typical stellar wind bubble generated by a massive Wolf-Rayet star (HD 192163), which is located inside it; this star would also be responsible for the nebula, which would constitute the material of the outermost layers of the expelled star. This wind collided with the material ejected by the star as it reached the red giant stage, between 250,000 and 400,000 years ago, energizing it. The result is a gaseous shell and the presence of two shock waves, which then interacted with the surrounding dense interstellar medium. In the past it was also thought to have been a supernova remnant, whose progenitor star was part of the HD 192163 system. The nebula extends in space to a size of about 16 light-years.

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NGC 6888 Crescent nebula and Soap Bubble, Luca Dinoi