The Crescent nebula is a bright emission nebula located in the constellation of Cygnus. It lies around 5000 light years away. The Earth was a very different place when the light I captured first left the nebula. The central star is a Wolf-Rayet star, one which has a mass greater than 20 solar masses and is shedding its mass in a solar wind to create the nebula which we see in the image. One day this star is most likely to go supernova.

The target is quite a difficult target, and there is a lot of detail that is missing and I will never be able to get without dark skies and narrowband filters. There are some absolutely sensational images of NGC6888 if you do a google search you will see some of the fascinating images that have been acheived.. The image itself was taken as hour and 30 minutes worth of second subs at ISO 800 under the influence of the not quite full moon so the histogram wouldn’t take any more length of exposure without loosing out to noise. Once the data was acquired it was stacked in Deepskystacker and the curves and levels were adjusted in Photoshop. This target has been my most difficult in post imaging editing and needed a lot of tweaking to maintain detail in the stars whilst trying to pull out as much data as possible in the nebula.

Ps: For those who don’t know what the hell I am talking about please just ask. I am well aware that there is a lot of jargon and things that don’t quite click until they are explained clearly.


96% lit moon

96% Waning moon.

The moon taken on 27th October 2012. The image is a stack of 1000 frames captured using my canon 1100d attached prime focally to the SW150PL. The AVI file was processed in registax 6.