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This is a child's question I failed to answer. When observing some stars with naked eye, some stars (e.g. Regulus) appeared to blink significantly more than others, but I did not have the patience to identify them. Those stars twinkling more were on different positions on the sky, not next to each other. The sky was clear and cloudless, with quite a bit of ambient light of the neighbouring houses.

I tend to say that brighter stars seems to blink more, and the atmopheric effects are simply easier to perceive. But is that really correct?

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    $\begingroup$ Dod you account for elevation? Those closer to the horizon may twinkle more enthusiastically as their light passes through the "twinkle zone" at an oblique angle and has more chance to get twinkled. $\endgroup$
    – uhoh
    Commented Mar 7, 2021 at 0:24
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    $\begingroup$ Thanks for the hint. Regulus was actually closer to the zenith than to the horizon during observation. $\endgroup$
    – B--rian
    Commented Mar 7, 2021 at 1:49
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    $\begingroup$ You should make this an answer, @uhoh :) (e.g. mentioning the significance of the air mass) $\endgroup$
    – pela
    Commented Mar 7, 2021 at 13:05
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    $\begingroup$ There may be wisps of cloud that are hard to see at night but that cause extra twinkling in some parts of the sky? $\endgroup$
    – Kristoffer Sjöö
    Commented Mar 7, 2021 at 17:08
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    $\begingroup$ Brighter stars also seem to twinkle more than fainter stars. They probably twinkle as much; it’s just that the faintness of some makes the twinkling more subtle. $\endgroup$
    – Pierre Paquette
    Commented Mar 11, 2021 at 23:23

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