運うん動どう星せい団だん

Meanings

1

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.

group, association

Similar words

散さん開かい星せい団だん
散開星団 (open cluster) is a gravitationally bound group of stars, while 運動星団 (moving cluster) is defined by shared motion rather than gravitational binding.
星せい団だん
星団 (star cluster) is a general term; 運動星団 is a specific type characterized by common proper motion.

Etymology

Compound of 運動 (うんどう, 'motion') and 星団 (せいだん, 'star cluster'), literally 'motion star cluster'. The term is a direct translation of the English 'moving cluster'.