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Old 11-04-2013, 06:37 AM
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strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,689
Quote:
Originally Posted by batema View Post
What does going "deep" mean?
To me it is when you reveal faint extended features that are below the level of the natural sky brightness, particularly from a true dark sky, rather than seeing fainter and fainter stars (although this is part of it too)

Mike
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