Is the constellation a celestial system? Why?

Constellation is not a celestial system, it is artificially synthesized by many celestial bodies (stars), just like the Big Dipper we see, which is different 5000 years ago and 5000 years later. We connect some stars in the earth's area to identify the stars, which is called the constellation we see, but the distance between them is very far. If we leave the earth and look at the starry sky from different directions, the starry sky is different from what we see on the earth.

I hope it helps you.