| 单词 | orion association |
| 释义 | Orion associationOrion association(I Orionis) A large OB-association (see association) that contains over 1000 stars and lies in the region of the Orion nebula. There are at least three clusters in the association: the Lambda (λ) Orionis cluster, the Belt group around Epsilon (Ɛ) Orionis, and the Trapezium cluster. |
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