Question

Q .. explain why planets do not twinkle?
Ans. planets are much closer to the earth and are seen as extended source. so , a planet may br considered as a collection of a large number of point sized light source .
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Answer 1

Answer:

The planets are much closer to us as compared to the stars. Since the planets are closer to us, they appear much bigger and the light to come from more than one point. The light coming from several points undergoes refraction also. But this refracted light from several points cancels the twinkling effect .