# NGC6888-et Bulle de savon-13-08-2024-Hamois-Luc-Viatour

- By: Lviatour
- Date: 2024-08-13
- Classification: Photograph
- Museum: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:NGC6888-et_Bulle_de_savon-13-08-2024-Hamois-Luc-Viatour.jpg)
- Rights: [CC BY-SA 2.5](https://creativecommons.org/licenses/by-sa/2.5)
- Picture: https://invisiblenetwork.ai/thumbs/commons/thumb/6/67/NGC6888-et_Bulle_de_savon-13-08-2024-Hamois-Luc-Viatour.jpg/1920px-NGC6888-et_Bulle_de_savon-13-08-2024-Hamois-Luc-Viatour.jpg
- Who can see it: Teens profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)

NGC 6888, the Crescent Nebula, is an emission nebula located in the constellation of Cygnus. Discovered in 1792 by the German-British astronomer William Herschel, it is approximately 5,650 light-years away from us. This spectacular nebula is the result of extremely fast stellar winds from the star HD 192163 (WR 136), a massive Wolf-Rayet star. This star is destined for an explosive end as a supernova within the next 100,000 years.

At the bottom of the image, we can distinguish the Bubble Nebula, a much fainter object. It is a planetary nebula, meaning the remains of a medium-mass star at the end of its life, similar to our Sun. Discovered in 2008 by American amateur astronomer Dave Jurasevich, it is located about 4,000 light-years away, in the foreground of the Gamma Cygni nebulosities (the red regions). These latter are located at a slightly greater distance, about 5,000 light-years.

Photos taken with a Skywatcher Esprit 120ED refractor at 860mm focal length on an AZ-EQ6 mount with a Nikon Z7 modified camera and IDAS NBZII filter. Exposure time of 5 hours in 50 x 6 minutes, with 50 darks, 50 flats, and 50 bias frames. Setup managed with an Asiair Plus. Taken in Hamois, Belgium…