Is the Milky Way a cluster? Are the twelve constellations stars?

The Milky Way is not a cluster, but a galaxy, and you can tell the difference from its name. The friend upstairs extracted the information, and although there were some minor defects, it also got to the point. The milky way is made up of hundreds of billions of stars, but the cluster is only one million. I dare not take away the beauty of others, so I won't go into details on this question.

Let's focus on the second question. My friends upstairs think that the twelve constellations are stars. Is that true? In my opinion, it is negative, and it is a very wide misunderstanding, so it is necessary to mention it here. For example, Mars is now in Leo. If Leo is a star, how can we explain the existence of Mars?

from the glass window of the room, the scenery is divided into areas by the window. Looking at Guanghua Building on the right, facing pulmonary hospital in front, and a hotel on the left. The scenery in front of me is similar to the problem of the landlord.

all the celestial bodies you see are supposed to be located on the celestial sphere, just like the glass windows above. Man-made windows are divided into areas, just like railings on windows. The distant scenery is projected in the right area, so I can say it is located in the window on the right. By the same token, as long as the projection of a celestial body is located in a certain area, I can say that it is located in a certain constellation.

as long as it is projected in the area of a glass window, I can say that it is located in this glass window, whether it is a distant building, a kite outside the room or a bottle of reagent in the room. Speaking of which, does the landlord have any idea that the constellation is actually a direction?

Constellation includes many stars, but it is actually an area on the celestial sphere, or a direction. Upstairs, make a simple analogy between a direction and a star? Is it unreasonable? I hereby ask for advice.