Question

why is the pole star is used for identifying the nirth direction?​

Answer 1

Answer:

If you went out on the street and ask people at random what the brightest star in the sky was, odds are a majority would say, “The North Star!” It appears that most people arbitrarily figure that the most important star in the sky should also be the brightest, but in truth, the North Star, which goes by the name of Polaris, is a star of only medium brightness. In terms of overall rank there are quite a few stars brighter than Polaris. In fact, Polaris doesn’t even crack the top 40; it’s number 48 on the list of brightest stars.

What is the North Star?

The reason Polaris is so important is because the axis of Earth is pointed almost directly at it. During the course of the night, Polaris does not rise or set, but remains in very nearly the same spot above the northern horizon year-round while the other stars circle around it.

So at any hour of the night, at any time of the year you can readily find Polaris and it is always found in a due northerly direction. If you were at the North Pole, the North Star would be directly overhead.

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