Question

why do the stars twinkle while planets and moon does not

Answer 1

As a star's light pierces our atmosphere, each single stream of starlight is refracted – caused to change direction, slightly – by the various temperature and density layers in Earth's atmosphere. ... Planets shine more steadily because … they're closer to Earth and so appear notas pinpoints, but as tiny disks in our sky

Answer 2

 

Why Do Stars Twinkle?



Light from stars crosses a very long distance to reach us and also passes through Earth’s atmosphere, which vary in temperature and density. Our atmosphere is very turbulent, with streams and eddies forming, churning around, and dispersing all the time. Every layer of Earth’s atmosphere has air moving in different directions at different intensities. When light from stars passes through the atmosphere, it is bent due to refraction, which is why stars seem to twinkle when we stare at them. If viewed from outer space, you would not see the stars twinkling.

Why Planets Don’t Twinkle

Planets, just like the Sun, do not twinkle. Planets are also closer to the Earth than those distant stars, so planets appear larger in comparison. Due to the planets’ apparent closeness to Earth, the light coming from these celestial bodies does not bend much due to Earth’s atmosphere. Therefore, the light coming from our solar system’s planets does not appear to twinkle like stars.