Speaking of Polaris, many people are actually familiar with it, especially when they are lost in the wild, they can use Polaris to locate their position. It is very likely that in a few decades, it will reach the true north direction of the real North Pole, but after that, it wil

Speaking of Polaris, many people are actually familiar with it. Especially when they get lost in the wild, they can use Polaris to locate their position, because it seems that from ancient times to the present, Polaris has always referred to the direction of the north, and Polaris is the star closest to the North Sky Pole. The position of the Polaris is very stable, as if there has not been any change since ancient times. So what unique mysteries does Polaris contain? Why has the Polaris never changed its position from ancient times to the present? But in the sky, other planets will constantly change their positions as the four seasons change?

If you want to understand the mystery, you must understand the North Star. Which star is called the North Star? In fact, it is the brightest star in the north of the sky, and it is almost opposite the earth axis . Although we can rely on it to distinguish the direction now, the North Star is not what we generally believe to be in the position that will never change.

Some related content about Polaris. When I was in school, I learned that all the stars in the sky will change over time and their positions will change continuously. This is mainly caused by the rotation of the earth. To be precise, the stars we see in the sky have not changed at any position, but the earth is constantly rotating, which is why we see that the positions of the stars have changed.

. Everyone knows that the earth's rotation is from west to east. However, because the North Star is close to the northernmost end of the Earth's axis, it seems that it remains unchanged. Just like when we look at the globe, it moves the globe and points to a point at a point without any change. Therefore, the North Star is above the central axis, so we see that it seems to be kept in a position without any change.

Of course, in addition to the rotation of the earth, there must be an orbit on the earth. If , the earth's revolution , will the position of the North Star change? According to common sense, there will indeed be some changes, but since this North Star is relatively far away from our earth, it is about 434 light-years .

. Relatively speaking, the diameter of the earth's revolution is not particularly far, about 300 million kilometers. So if you convert it this way, it seems that the position of the North Star seen on the earth has not changed much, and we can still judge the northern position of the earth based on the position of the North Star.

Of course, if it spans a longer unit time, such as thousands of years and tens of thousands of years, after careful observation, you will find that the position of the North Star does indeed have a significant deviation. One problem to be explained here is that this North Star is not fixed and always points to the same star.

Many people may be surprised about this issue, because most people think that the North Star may always point to the brightest star in the northern sky. In fact, what needs to be clarified here is that in the place close to the northern celestial pole, the more conspicuous stars are constantly changing.

Because after a long period of planet transformation, the North Star will also be transferred. The North Star we see now is actually the brightest star in Ursus , called Ursus α. This star has a mass about four times larger than the sun, and is relatively far away from the earth. Moreover, this star is actually an triad star .

is called Polaris because it is located in the north, but researchers say that it is speculated that this star cannot be called Polaris forever. It is very likely that by 14,000 AD, the Polaris will no longer be the star of the current Ursus constellation, and it is very likely that it will be replaced by Vega .

Why does this happen? It is mainly because the position pointed at the north end of the earth will be cycled around 250,000 years, so the position of the pole star pointed to by the earth's axis will also change. In the past, in ancient times, the North Star actually seemed to have changed, but now the North Star we see is closer to the North Sky Pole, which is also due to its continuous changes in its position.

And researchers say that this position close to the North Heaven Pole will be infinitely close. It is very likely that in a few decades, it will reach the real North Pole point, , the north direction of the real North Pole, but after that, it will not be able to remain in the north direction, but will gradually begin to deviate from the North Heaven Pole, slowly becoming farther and farther away from the North Heaven, and will eventually be replaced by other stars.

So what we are talking about is not simply pointing to a brighter star in the north among the cosmic stars, nor can it specifically refer to a star. Although it is referring to this star now, it may become another star in the universe in a thousand years. Although this statement sounds a bit surprising, it is definitely scientific.