運うん動どう星せい団だん

noun

moving cluster

Astronomical term for a group of stars that share a common motion through space, such as the Ursa Major Moving Group.

• おおぐま座ざ運うん動どう星せい団だんは、よく知しられた運うん動どう星せい団だんの一ひとつです。

  The Ursa Major Moving Group is one of the well-known moving clusters.