Why only stars twinkle and not the planets or the moon or sun

Asked by  | 29th Jul, 2009, 02:08: PM

Expert Answer:

Planets, moon and sun look much bigger in size than the stars because they are situated at much smaller distances. Each planet can be supposed to be made up of a number of point sources.
When some of the point sources appear brighter, others appear dimmer. Therefore overall brightness of the planet or moon or sun remains same always and they do not appear to twinkle.

Answered by  | 29th Jul, 2009, 02:19: PM

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