1. Double ClusterThe Double Cluster (also known as Caldwell 14) is the common name for the naked-eye open clusters NGC 884 and NGC 869 (sometimes designated χ Persei and h Persei, respectively, but those designations would really apply to both clusters and to a visually nearby star), which are close together in the constellation Perseus. NGC 884 and NGC 869 are at distances of 7600 and 6800 light-years away, respectively, so they are also close to one another in space.
Read “Double Cluster” on English Wikipedia
Read “二重星団” on Japanese Wikipedia
Read “Double Cluster” on DBpedia
Read “Double Cluster” on English Wikipedia
Read “二重星団” on Japanese Wikipedia
Read “Double Cluster” on DBpedia
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