Alnitak

Alnitak is the bright blue star.

Alnitak, also known as Zeta Puppis, is a triple star system made out of three blue stars in the constellation Orion. It is part of Orion's Belt. It is a rare O9-type star 20 times larger than the Sun.

Alnitak Media

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  Orion's Belt with Alnitak on the left

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  Alnitak Aa compared to the Sun (to scale)