What constellation does Polaris belong to? How cold is the North Pole?

Polaris belongs to Ursa minor, and the North Pole is extremely cold. Polaris is not an eternal star. Now it is Alpha Ursa minor, and it will be Vega in the year of 14000. According to the calculation of the earth's axis swing and stellar gravity, by 2 100, Polaris will reach the nearest position directly above the North Pole and gradually move away from the North Celestial Pole. The North Pole is very cold. This is a big ice bank on the earth. During the freezing period in winter, the entire Arctic Ocean was almost completely covered by sea ice, covering an area of 6,543,800+0.45 million square kilometers, which was 50% larger than the land area of China. Looking down at the fragmented sea ice in the Arctic Ocean from the air is like an abstract painting of God. Even in summer, there are still 465,438+million square kilometers of ice in the Arctic Ocean. In the central area of these perennial sea ice, it is permanent sea ice that has been frozen for 3 million years. Ice appears blue because of its purity and excessive internal pressure. This is an excellent place to see Lan Bing. Source: Advanced Reading Guide for Primary Schools