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

The Milky Way is not a cluster, but a galaxy, and you can also hear the difference from the name. The friend upstairs extracted the information, and although there were some minor flaws, it also hit the nail on the head. The Milky Way is made up of hundreds of billions of stars, but there are only one million clusters. 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 it true?/You don't say. In my opinion, it is negative, and it is a wide misunderstanding, so it is necessary to mention it here. For example, now Mars is in Leo. If Leo is a star, how can we explain the existence of Mars?

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

Suppose all the celestial bodies you see are located on the celestial sphere, just like the glass windows above. Man-made windows are divided into zones, just like railings on windows. The distant scene is projected in the right area, so I can say it is located in the window on the right. Similarly, 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 into 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 or a direction on the celestial sphere. Upstairs, make a simple analogy between the direction and the stars? Is it unreasonable? I hereby ask for advice.