Question

why do stars twinkle and why planets donot twinkle​

Answer 1

Answer:

Answer:Unlike stars, planets don't twinkle. Stars are so distant that they appear as pinpoints of light in the night sky, even when viewed through a telescope. Because all the light is coming from a single point, its path is highly susceptible to atmospheric interference (i.e. their light is easily diffracted).

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Answer 2

Answer:

Planets being of larger size can be taken as a collection of large number of point-sized objects/sources of light, which nullify the twinkling effect of each other.

Due to varying conditions of atmosphere, starlight undergoes multiple refraction and its path varying slightly while passing through the atmosphere.

Therefore, the apparent position of star fluctuates and amount of light entering the eye changing continuously.

The star sometimes appear brighter and some other time, it appears fainter.

This causes twinkling of star.