Under what specific atmospheric conditions can both Venus and Jupiter exhibit noticeable twinkling?

Answer

When they are very low on the horizon, near setting or rising

When either planet is low on the horizon, its light must traverse the maximum amount of turbulent atmosphere, which can cause even planets to display scintillation.

Under what specific atmospheric conditions can both Venus and Jupiter exhibit noticeable twinkling?

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How to Find the Planets in the Night Sky - YouTube

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