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The "Demon Star" is Beta Persi, which means it is the second brightest star in the constellation Perseus. Its official name is Algol. It is also the first variable star (in increases and decreases in brightness) that was ever found. The reason for its variability is the fact that it is not one star but two orbiting each other in close proximity. (It is a binary star)

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What is another word for the North Star?

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What type of star is Alpha Velorum?

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What type of celestial object does your planet orbit?

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