What is the only star that does not move in the whole sky?

Such stars do not exist, and in the detectable region, only Polaris appears to be motionless, but according to some studies, Polaris also has its own motion.

According to current astronomers, there are no immobile stars in the preceding region. Although we now see the Moon or other stars unchanged because there is a relative stillness between us.

All stars are moving, and the reason why we see some stars are not moving is because they are far away from us, there are small changes that we will not observe with the naked eye, all stars rotate and orbit.

According to the data, the position of the North Star never seems to have changed since records began in ancient times, but it has been confirmed that its immobility is also due to the relative stillness formed by the Earth's autobiography.

In fact, there are no completely different stars in the sky, stars are all moving, and we see to the naked eye that some stars are motionless, just because they are relatively stationary.

Stars are spherical or globular objects made up of hot gas that emit light on their own. The Sun, the host star of our solar system, is a star.

So there is more than one star in the sky, and the stars in the sky at night are all stars (except for a few planets that can be seen with the naked eye, such as Venus, which is the morning star, and so on). According to current extrapolation, there are about 400 billion stars in the Milky Way, with a plus/minus error of 50%, so the number of stars in the Milky Way is 200 billion 600 billion. There are 100 billion 200 billion galaxies like the Milky Way in the universe.

If the number of stars in the Milky Way is calculated at a minimum of 200 billion, the number of stars in the universe is 2 1022 4 1022, or 20 trillion 40 trillion billion. So, the number of stars in the sky is so large that we can't count them all, just as we can't count how many grains of sand there are in a desert.

But the sun is one

Hehe. Most of the stars you see when you look up at night are stars, and that's just what you can see, in the universe, there are tens of billions, hundreds of billions of stars...

No! The stars you see at night are mostly stars, just far, far away!

It's the "North Star".

Polaris is the star closest to the North Celestial Pole. Due to the rotation of the Earth, and Polaris is on the axis of rotation of the celestial sphere, it is relatively immobile.

Polaris is located on the northern extension of the Earth's axis of rotation, and at this stage it refers to the "Ursa Minor", the Chinese name "Gou Chenyi", which is a five-fold extension of the line between Tianxuan and Tianshu in the Big Dipper. Polaris.