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| Rolf Olsen | profile | all galleries >> Astrophotography >> Open clusters | tree view | thumbnails | slideshow | 
![]() Ptolemy's Cluster - Messier 7  | 
![]() NGC6520 and Barnard 86  | 
![]() The Jewel Box Cluster in Crux  | 
![]() NGC2362  | 
![]() The Gem Cluster NGC3293  | 
![]() NGC3532  | 
![]() NGC3766  | 
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