why the planets do not twinkle
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planets are much closer to the earth and are extended source of light .as planet are large number of point sized source of light the total varitation in the amount of light entering our eyes will average out to zero. Hence planets do not twinkle
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Explanation:
Planets are much closer to the earth and are seen as extended sources. So, a planet may be considered as a collection of a large number of point-sized light sources. Although light coming from individual point-sized sources flickers but the total amount of light entering our eye from all the individual point-sized sources average out to be constant. Thereby, planets appear equally bright and there is no twinkling of planets.
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