open cluster in a sentence

Examples

1. It has been listed as a member of the open cluster ASCC 123.
2. "' NGC 381 "'is an open cluster in the Cassiopeia constellation.
3. Astronomers dubbed the former globular clusters, and the latter open clusters.
4. "' NGC 6530 "'is an open cluster in the constellation Sagittarius.
5. Notable features include the open cluster NGC 6025 and planetary nebula NGC 5979.
6. Berkeley 90 is a smaller open cluster, with a diameter of 5 arcminutes.
7. The most prominent open cluster in Scutum is the Wild Duck Cluster, M11.
8. NGC 457 is another open cluster in Cassiopeia, also called the Caldwell 13.
9. Far dimmer than the other open clusters is NGC 2126 at magnitude 10.2.
10. Blooms occur in open clusters, up to as many as nine, throughout the season.