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Gerhard Bachmayer | all galleries >> AstroPhotos >> Astrophotos 2008-2018 > NGC6888 - the Crescent Nebula in Cygnus
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NGC6888 - the Crescent Nebula in Cygnus

NGC6888 - the Crescent Nebula in Cygnus


The nebula is the glowing remain of the outer hydrogen shell, shed off from a red super-giant sun and exposing its helium burning center, which is called a Wolf-Rayet star. Strong stellar winds from the star compressed and stimulated the surrounding gas and dust, and the strong ultra violett radiation excited it to glow.
In a few million years the star will end its life in a super nova.

Telescope: ASA 20"/F9 Cassegrain
Mount: ASA DDM85
Camera: FLI PL16803
Filter-wheel: FLI CW 5-7
Filter: FLI RGB, Ha - 8nm, OIII - 8nm
Exposure: Ha:13*1200sec, OIII:13x1200sec, RGB: 4x300sec each
Programs: Maxim DL 5.0, CCDStack 2.75, PixInsight SE 1.8 full exif

other sizes: small medium large original
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