Planets do not twinkle because.

they are much closer to us than stars and their light does not have to pass through as much of Earth's atmosphere. Stars twinkle because their light has to pass through different layers of Earth's atmosphere, causing it to be refracted and scattered, creating the twinkling effect. Planets, on the other hand, appear as steady points of light in the sky.

Planets do not twinkle because they are much closer to Earth than stars, so their light does not have to travel through as much of the Earth's atmosphere. The Earth's atmosphere causes stars to twinkle because it is not uniform, and the light from stars is refracted (bent) as it passes through it. This causes the light from stars to appear to move around, or twinkle. Planets are much closer to Earth, so their light does not have to travel through as much of the atmosphere, and it is not refracted as much. This means that planets do not twinkle.