Credit & Copyright: Thomas V. Davis      
(tvdavisastropix.com)    
    
Explanation:
Most star clusters are singularly impressive.     
    
Open clusters NGC 869 and NGC 884,     
however, are doubly impressive.     
    
Also known as "h and chi Persei", this unusual     
double cluster, shown above, is bright enough to be seen from a     
dark location without even     
binoculars.     
    
Although their discovery surely predates     
written history, the Greek astronomer     
Hipparchus notably cataloged the "double     
    
cluster".     
    
The clusters are over 7,000 light years distant toward the     
constellation of     
Perseus, but are separated by only hundreds of light years.    
    
    
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| Публикации с ключевыми словами:
open cluster - Рассеянное скопление - двойные системы Публикации со словами: open cluster - Рассеянное скопление - двойные системы | |
| См. также: Все публикации на ту же тему >> | |

 
