Question

why do stars twinkle?

Answer 1

due to atmospheric refraction and due to high pressure in gasses

Answer 2

hey mate here is ur answer
Stars twinkle because of turbulence in the atmosphere of the Earth. As the atmosphere churns, the light from the star is refracted in different directions. This causes the star's image to change slightly in brightness and position, hence "twinkle.
hope it help u
happy winter