A Double Star Cluster in Perseus

Explanation: Most star clusters are singularly impressive. Open clusters NGC 869 and NGC 884, however, could be considered 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 recorded 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. In addition to being physically close together, the clusters' ages based on their individual stars are similar - evidence that both clusters were likely a product of the same star-forming region .