Is Polaris Wei Zi or Gouchen?

Polaris, also known as Beichen and Zixing, refers to the star closest to the North Celestial Pole. At present, it refers to "Gou Chen Yi". Polaris is located at the northern end of the earth's axis, which is five times as long as the extension line connecting Tian Xuan and Shu Tian in the Big Dipper. Because of the rotation of the earth, and Polaris is on the axis of celestial rotation, the observer is stationary relative to the ground. Polaris is about 323 to 434 light-years away from the earth and has a diameter of about 52 million kilometers. "Gouchenyi" consists of three celestial bodies: Polaris Aa, Polaris B and Polaris Ab. The main star Polaris A is a huge, bright and yellow Supergiant star. Polaris A is 4.5 times the mass of the sun, and if it is placed with the sun, its brightness is 1260 times that of the sun.

Because the earth rotates around the earth axis, and Polaris is very close to the north extension line of the earth axis, Polaris is almost motionless in the sky at night, with its head tilted to the north, so it can indicate the north.