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Solitary Stars
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Single star count ups odds of ET

Solitary suns like ours are not as rare as we once thought, boosting the likelihood that there are other life-friendly solar systems in the universe.
It is not always easy to tell if a star has a companion, since they are often too close together to distinguish as separate objects with a telescope. But astronomers can look for other clues, such as periodic changes in the star system's light spectrum caused by the motion of the stars as they orbit one another.

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