英仙双星团
2021年10月8日 The Double Cluster in Perseus Image Credit & Copyright: Jack Groves Explanation: This pretty starfield spans about three full moons (1.5 degrees) across the heroic northern constellation of Perseus. It holds the famous pair of open star clusters, h and Chi Persei. Also cataloged as NGC 869 (top) and NGC 884, both clusters are about 7,000 ligh...