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Which is the nearest supergiant star to Earth?

Answer 1

Probably #alpha# UMi Aa, the yellow supergiant of the stars forming the multiple star we commonly know as Polaris.

The closest supergiants are Antares and Betelgeuse, but it appears that the largest star in the multiple star system known as Polaris, the cepheid variable yellow supergiant, is the closest.

A popular estimate of its distance was #434# light years, but it may actually be much closer. The most recent estimate seems to be about #346# light years.

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Answer 2

Hailey Alexander

Betelgeuse, a supergiant star in the Orion constellation, is the closest supergiant star to Earth, situated some 643 light-years away.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.