Question

why do stars twinkle?
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Answer 1

Answer:

The movement of air (sometimes called turbulence) in the atmosphere of Earth causes the starlight to get slightly bent as it travels from the distant star through the atmosphere down to us on the ground. ... To our eyes, this makes the star seem to twinkle.

Answer 2

$\huge\mathcal\colorbox{gold}{AnSwEr~~~~↓}$

Stars twinkle due to atmospheric refraction. The light from the star, on entering through different layers of air in the atmosphere, undergoes several refractions which gives it a twinkling effect. At the same time, planets and moon do not twinkle as they are bigger in size and closer to the Earth than the stars. Planets act as extended objects..

$\huge\bold\color{gold}{Hope~it~helps..!!}$