h and Chi Persei

h and Chi Persei

(per -see-ÿ) (Sword-Handle; Double Cluster in Perseus) A fine double cluster in the constellation Perseus. Both the constituent open clusters, NGC 869 (h Persei) and NGC 884 (Chi [χ] Persei) are visible to the naked eye. They are relatively young clusters, about 10 million years old, and appear to be associated with the surrounding Zeta (ζ) Persei OB-association. See association; OB cluster.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006