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This is part of Corona Australis or the Southern Crown. The dark patch in the centre is a Dark Nebula Be157 (not a lot of imagination there). It is a cloud of Dust and gas that blocks the light of the background sky. The tight ball os stars is called a Globular Cluster and contains 100’s of thousands of stars. While it lies in the same field of view it is many 1000’s of lightyears further away. It has the rather boring name of NGC6723. The blue glow surrounding several star is a reflection nebula. the light of the stars is reflecting off the dust and gas surrounding them.
This image was taken with a Nikon D300 using the 70-200VR lens. Set at 200mm and at f2.8 the exposure is 5 minutes. the camera was piggybacked on my friends telescope
In my 20" telescope the darkest section of the nebula fills the view with a medium power eyepiece, and I have taken to naming this the Field of nothing. Hence the name of the image.
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