If it is your own sign that appears in a dream, it symbolizes a part of you that is not fully recognized or understood, or it is just a suppressed character of you.

If what appears is not your own sign, then it represents something in your personality, consciousness or subconscious mind.

Dreaming that the North Star and the constellations are changing and moving, dreaming that the stars are changing and moving is a good dream, which means that your good luck has come, and something good has happened recently, which is the time for your luck to turn around.