Polaris is always directly north of Earth, which seems a bit magical. In the entire galaxy composition of the universe, the north direction of the North Star is quite sensitive, which is the unique feature of the North Star. We can't help but ask the question, do the North Star and the entire Big Dipper belong to the same galaxy?
In fact, the Big Dipper does not belong to the same galaxy. Polaris belongs to ursa minor, the brightest star in the constellation Ursa Minor, and is astronomically code-named Ursa Minor α. Polaris is not far from Earth, only 434 light-years away. In the entire bear constellation, the North Star is located at the tip of the bear's tail, so it is quite representative.
The secrets of the North Star don't stop there. It is actually the legendary triad system, which is also known as the three-body system. The other two companion stars are not conspicuous, and this star in the northern sky of the Earth is now difficult to see, because the North Star will continue to fade because of the impact of human field lights on the starry sky.
In addition to the North Star, the Big Dipper, the star codenamed The Celestial Hub, belongs to the α Ursa Major, that is, the Wolf Star, which is only 124 light-years away from us, and the Big Dipper two is the β star in the constellation Ursa Major, about 79 light-years away from Earth. The seven stars of the Big Dipper all belong to ursa majority, but the North Star belongs to Ursa Minor.
Polaris is also farther away from Earth in absolute terms, with the exception of α Ursa Major, the remaining Big Dipper five stars are within 100 light-years of Earth. I remember the clear night sky when I was a child, and the Big Dipper was always the brightest combination in the northern sky. On a clear summer night, watching the bright stars in the sky fall asleep, which may be a pleasure that children today will never get. What do you think?