Orion Association

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A large association of very young stars of spectral types O and B, centred on the Orion Nebula, nearly 1500 l.y. away. It is about 400 l.y. across and contains all the main stars of Orion, except Betelgeuse. The area is still partly shrouded in gas from which stars continue to form.

Subjects: Astronomy and Astrophysics.

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