Which constellation does Polaris belong to?

Which constellation does Polaris belong to? Polaris belongs to Ursa minor. About 430 light years away from the earth, it is a star with stable brightness and position that can be seen in the night sky. Because Polaris is closest to true north, people on earth have been navigating by its starlight for thousands of years.

Which constellation is Polaris located in?

Polaris is the brightest star in Ursa minor, that is, Ursa major? Star. It is a yellow giant with a spectral type of F, about 434 light years away from the Earth, and its mass is about four times that of the sun. It is a bright star far away from the earth, at the tip of the bear's tail in the constellation diagram. Gou Chenyi is also a star of underworld nature. Connect a straight line between Tian Xuan and Shu Tian at the front end of the Big Dipper, and then extend the distance five times to Shu Tian. You will meet a bright second-class star, which is Gou Chenyi. This is the easiest way to find Gou Chenyi.

Like Ursa Major, Ursa Major's tail can also be regarded as the handle of a bucket (or spoon), so it is called Little Beidou: four of the seven stars form a ladle on the bucket, just like the Big Dipper. Ptolemy, an astronomer in the 2nd century A.D., incorporated Ursa minor into its 48 constellations, and since then it has become one of the 88 modern constellations. Traditionally, Ursa minor is an important navigation constellation, especially in navigation, because the first constellation in Ursa minor is Polaris.

How big is Polaris?

Polaris is a bright star in the northern part of the sky, near the north celestial pole, located at about 0? . 7 (in 2004), it is a type F high luminosity star with late spectrum, and its apparent magnitude is 2.02. , 430 light years away, about four times the mass of the sun, is the closest Cepheid variable to the earth. Polaris has a mass of 8 170 tons. Almost opposite the earth axis, from the northern hemisphere of the earth, the position is almost unchanged, which can be used to identify the direction. However, due to precession, Polaris is not a star whose position will never change, and it will be Vega by the year 14000. Every 25,800 years, Polaris will cycle.

How to look at Polaris and tell the direction?

The way to find the North Star is to find the Big Dipper first. Extend upward from the mouth of the Big Dipper (Shu Tian and Tian Xuan) for five times, and you will find the North Star.

In fact, if you watch the Big Dipper every hour at night, you will find that it has been slowly circling the North Star from east to west. On the other hand, Polaris doesn't move at all. It's always in the north. It travels and sails at night. As long as you recognize Polaris, you can point out the direction of the north.

The law that the Big Dipper revolves around the Polaris from east to west is called the Big Dipper by ancient astrologers in China. Through the law, people can judge the season and time.