Stars and planets emit light, but the light from stars has to travel through more of Earth's atmosphere than the light from planets. The atmosphere is made up of different layers of air with varying temperatures, humidity levels, and densities. These layers of air act like lenses, bending the light as it passes through them. This causes the light from stars to scatter in different directions, creating the twinkling effect.


Another reason why stars twinkle and planets do not is because of their size and distance from Earth. Stars are much farther away from Earth than planets, which makes them appear much smaller in the night sky. As a result, the light from stars is more easily affected by the atmosphere, causing the twinkling effect. Planets, on the other hand, appear much larger and closer to Earth, which means that their light is not as easily scattered by the atmosphere.


Another reason why planets do not twinkle is because they have reflective surfaces. Planets reflect light from the sun, which means that the light that reaches Earth is not as affected by the atmosphere as the light from stars. This is why planets appear to be much brighter and more stable in the night sky than stars.


In conclusion, stars twinkle and planets do not because of the atmospheric interference, size and distance, and reflective surfaces. The light from stars has to travel through more of Earth's atmosphere than the light from planets, which causes the twinkling effect. Planets, on the other hand, appear larger and closer to Earth, and have reflective surfaces that make their light less affected by the atmosphere.

Stars are very far from us whereas planets are near to us due to the atmospheric refraction the stars twinkle ad planets are larger in size and much closer to us we also see the stars higher than they actually are