(Astronomi) Betelgeuse (Alpha (α) Orionis) iş a semiregular variable star located 427 light-years away. İt iş the second brightest star in the constellation Orion, and the ninth brightest star in the night sky. Although it has the Bayer designation "alpha", it iş not as bright as Rigel (Beta Orionis). İt iş a vertex of the Winter Triangle asterism
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Definition of the second brightest star in orion in English English dictionary