Question

why do Stars appear to twinkle at night​

Answer 1

Answer:

The movement of air (sometimes called turbulence) in the Earth's atmosphere causes the starlight to get slightly bent as it travels from the distant star through the atmosphere to us on the ground. ... Stars closer to the horizon appear to twinkle more than others.

Answer 2

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As light from a star races through our atmosphere, it bounces and bumps through the different layers, bending the light before you see it. Since the hot and cold layers of air keep moving, the bending of the light changes too, which causes the star's appearance to wobble or twinkle.