What are the seven nights in the north?

The seven nights in the north are: fighting, cows (cows), women (bearded women), emptiness, danger, houses (barracks) and walls (east walls).

1. Sinus:

Dou is one of the seven nights in ancient China, also known as the Big Dipper. It is a part of the constellation Ursa major, consisting of seven bright stars arranged in a spoon shape. The brightest star is Polaris. The Big Dipper was widely used in navigation and lunar calendar calculation in ancient times, and was regarded as an important tool of ancient astronomy in China.

2. Cattle (morning glory):

Cattle, also known as Petunia or Niusu, is one of the seven constellations in the north. It is located in the southeast of Lyra, representing a bull's head shape facing west, and its two corners face south. In ancient mythology, this constellation is associated with the legend of Cowherd and Weaver Girl, which is one of the backgrounds of traditional Valentine's Day in China.

3. Female (in the seventh grade, it must be female):

Hostess seven, also known as the bearded girl, is a constellation in seven huts in the north. It is located in the northern part of the summer triangle, and its shape is a bit like a woman wearing a gauze hat. In the traditional culture of China, Nu Wa is associated with the image of a fairy, symbolizing beauty and peace.

4. Virtual:

Xu is a constellation in the northern seven nights, located in the northeast of Lyra. There is a bright star in the virtual constellation, called virtual one, which is the main star of this constellation. In ancient times, virtual accommodation was often used to assist navigation and lunar calendar calculation.

5. Danger:

Wei is a constellation in the northern seven nights, located in the southeast of Lyra. It's shaped a bit like a bucket boat. There is a bright star in the dangerous house called Dangerous House No.1, also called Dangerous Star.

6. Room (camp room):

Room, also known as the camp room, is one of the seven northern cottages, located in the northeast of Lyra. The bedroom presents a quadrangle in the night sky, which represents an important concept in ancient astronomy.

7. Wall (East Wall):

Wall, also known as the East Wall, is a constellation in the northern seven nights, located in the east of Lyra. The shape of the wall is like a wall, which represents the timing instrument of the ancient lunar calendar. In the starry sky, adjacent to the camp room.

As an important part of ancient astronomy, the seven nights in the north played an important role in navigation and lunar calculation. They are not only the reference objects for ancient people to observe the starry sky, but also carry many beautiful myths and legends, which provide people with convenience in stargazing, navigation and timing. At present, seven nights in the north is still a popular target for stargazers, bringing endless imagination and romance to people.