Orion 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.

Collins Dictionary of Astronomy © Market House Books Ltd, 2006

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Trapezium

References in periodicals archive

To the west-southwest is the mighty Orion Association, centered some 1,500 light-years away.

Observing the Milky Way, Part III Perseus to Puppis & Beyond: the winter Milky Way is faint and vague, but it's adorned with some of the finest clusters and nebulae in the sky

In the opposite direction, on the Orion Arm (or "Spur"), we see the Orion Association, responsible for most of the Hunter's bright stars.

Scorpius Stalks the South : As the northern nights become shorter and warmer, look for the Scorpion lurking along the southern horizon

These are members of the Orion Association, hot young stars in the nebula-strewn edge of the Orion Arm of our galaxy -- the spiral arm in which we ourselves are located, though more toward its inner side.

Orion at its peak

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