While the star Proxima Centauri is not visible to the naked eye, it is one of the best-known stars in the night sky. That's because it's the closest star to the Sun, at how many light-years away?

Answer 4.25

Proxima Centauri is a small, low-mass star situated in the southern constellation of Centaurus, 4.2465 light-years away from the Sun. Its Latin name translates as "Centaurus' closest star."

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