Crescent Nebula and PN G75.5+1.7 the Soap Bubble

Camera: Finger Lakes Instrumentation MicroLine ML8300 with FLI CFW-2-7 Filter Wheel

Mount: Paramount ME

Scope: Supernova Astrograph - 12.5

Colors: L:R:G:B with added Ha and OIII

Exposure Time: Varied LRGB plus 8x1200s Ha and OIII

Post-Production: MaxIm DL, CCDStack, PixInsight, and Photoshop CS5

Hello All. Here is a recent attempt to capture the Crescent Nebula in Cygnus. This one was captured using my homemade Supernova Astrograph. Many of the details in the image are possible because they were captured using narrowband filters, which allow only specific frequencies to pass. 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 beautiful image combines a composite color image with narrow band 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. 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. (Some text description from APOD)

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