How to distinguish the southern sky from the northern sky, and whether the zodiac is in the southern sky or the northern sky?

We usually say that the southern sky and the northern sky generally refer to the northern and southern sky with the celestial equator as the boundary. People in the northern hemisphere can certainly see the whole sky in the northern hemisphere, but they can't see the whole sky in the southern hemisphere.

Due to the rotation of the earth, the whole sky turns from east to west. When we look at the starry sky near Polaris, we will find a certain range of stars that never sink and always revolve around Polaris. Those are called "Gong Ji Stars", and the radius of Gong Ji Star is equal to our geographical latitude. On the contrary, in the southern sky, there are always some stars that will never rise for us to see.

Polaris is basically directly above the North Pole, and the Polaris seen in other places is diagonally above the north.

As for the direction of the sky, it corresponds to the ground. The east of the earth corresponds to the east of the sky, the west to the west, the south to the south, and the north to the north. However, our observation direction is different. In order to look at the map, we looked down and saw "going north, going south, left west, right east"; When we look up at the sky, we see "north, south, Zuo Dong and right west".