Luminescence is not the exclusive right of all stars.

1, correct, the starlight in the daytime is covered by sunlight, so it can't be seen; 2. Stars glow because of their own nuclear fusion, planets, satellites and comets are seen by reflecting sunlight, and meteors glow because of the friction between small celestial bodies and the atmosphere; 3. correct. The stars are far away from us. What we see is what they used to be. If they change now, it will take us years to see them.