Why planet are not twinkle?
Answers
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).
Stars are so far away, that their angular size is smaller than the resolution of the human eye - making them points. And then slight perturbations of the atmosphere make that point appear to twinkle, because it is smaller than the perturbations.
Planets are usually close enough (and large enough) that their angular size is actually greater than the resolution of the human eye. They aren't points to us - they have size - they consume area.
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