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M56 - A Globular Cluster

From the author of   Sizing Up The Universe

Click here for Hertzsprung-Russell diagram.


03:38 EDT Apr 21, 2007.
Starlight Express SXV-H9 on 10" RC at f/9.
L=11.5min, R=9min, G=8.5min, B=10.5min (unguided 30-second subexposures).
Log stretch, Unsharp mask.

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