ngc-6888

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NGC 6888 (Crescent Nebula) bicolor by Remidone
Via Flickr:
Camera: SBIG ST-10XME sensor -20°C with Sbig CFW10 and SXV-AO-LF Optics: GSO 10" f/8 RC carbon fiber Filters: Baader Exposure time (seconds): HA: 14×1200 bin 1×1 OIII: 13×1200 bin 1×1 Place: Pesaro (PU) Italy Date: 2/07/2016 - 29/07/2016

NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. This sharp telescopic portrait uses narrow band image data that isolates light from hydrogen and oxygen atoms in the wind-blown nebula. The oxygen atoms produce the blue-green hue that seems to enshroud the detailed folds and filaments. Visible within the nebula, NGC 6888’s central star is classified as a Wolf-Rayet star (WR 136). The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun’s mass every 10,000 years. The nebula’s complex structures are likely the result of this strong wind interacting with material ejected in an earlier phase. Burning fuel at a prodigious rate and near the end of its stellar life this star should ultimately go out with a bang in a spectacular supernova explosion. Found in the nebula rich constellation Cygnus, NGC 6888 is about 5,000 light-years away.

Object Names: NGC 6888, The Crescent Nebula

Image Type: Astronomical

Credit: Michael Miller, Jimmy Walker

Time And Space

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between sadr and ngc 6888 by telemaq76

Central Cygnus Skyscape : In cosmic brush strokes of glowing hydrogen gas, this beautiful skyscape unfolds across the plane of our Milky Way Galaxy and the center of the northern constellation Cygnus the Swan. The featured image spans about six degrees. Bright supergiant star Gamma Cygni to the upper left of the image center lies in the foreground of the complex gas and dust clouds and crowded star fields. Left of Gamma Cygni, shaped like two luminous wings divided by a long dark dust lane is IC 1318, whose popular name is understandably the Butterfly Nebula. The more compact, bright nebula at the lower right is NGC 6888, the Crescent Nebula. Some distance estimates for Gamma Cygni place it at around 1,800 light-years while estimates for IC 1318 and NGC 6888 range from 2,000 to 5,000 light-years. via NASA

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NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. This colorful portrait of the nebula uses narrow band image data to show emissions from sulfur, hydrogen, and oxygen atoms in the wind-blown nebula in red, green and blue hues. The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun’s mass every 10,000 years.

(Image Credit: J-P Metsävainio)