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单词 Alnitak
释义
Alnitak

Astronomy
  • The star Zeta Orionis, one of the three stars of the belt of Orion. It is a supergiant of type O9.5, magnitude 1.9, with a close companion of magnitude 3.7, a B0 giant that orbits it every 1500 years; the combined magnitude of the pair is 1.7. Alnitak is 740 l.y. away.


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